CN102980424A - Channel system - Google Patents
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- CN102980424A CN102980424A CN2012104736585A CN201210473658A CN102980424A CN 102980424 A CN102980424 A CN 102980424A CN 2012104736585 A CN2012104736585 A CN 2012104736585A CN 201210473658 A CN201210473658 A CN 201210473658A CN 102980424 A CN102980424 A CN 102980424A
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- air deflector
- channel system
- passage
- transition
- conduit wall
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Abstract
The invention relates to a channel system. The channel system is used for optimizing the relationship between the pressure decline of fluid flowing cross the system and heat, moisture and/or mass transfer. The channel system comprises at least one channel and at least one deflector, wherein the channel is provided with at least one channel wall, and the deflector has a preset height; the deflector laterally extends across the channel in the flowing direction of the fluid; the deflector comprises an upstream part, a downstream part and a middle part, the middle part is arranged between the upstream part and the downstream part, the upstream part deviates from the channel wall inward the channel in the flowing direction of the fluid, the downstream part returns back to the channel wall in the flowing direction of the fluid, and a transition between the middle part and the downstream part is bent by a preset radius (R3); a transition between the channel wall of the channel and the upstream part of the deflector is bent by a preset radius (R1); and the radius (R1) of the transition between the channel wall of the channel and the upstream part is 0.1 times of the preset height of the deflector to 2 times of the preset height of the deflector.
Description
The application is to be on April 18th, 2008 applying date, and application number is 200880128696.9, and name is called the dividing an application of Chinese patent application of " channel system ".
Technical field
The present invention relates to a kind of channel system, this channel system is for pressure drop and the heat of the fluid of optimizing the described channel system of flowing through, relation between moisture and/or the mass transfer, described channel system comprises at least one passage with at least one conduit wall and has at least one air deflector (flow director) of predetermined altitude, described air deflector extends transverse to described passage on the direction of Fluid Flow in A, described air deflector comprises upstream portion, downstream portion and the pars intermedia between described upstream portion and described downstream portion, described upstream portion departs from described passage from described conduit wall on described fluid flow direction, and, described downstream portion returns towards described conduit wall on described fluid flow direction, wherein, the transition (transition) between described pars intermedia and described downstream portion is crooked according to predetermined radii.
Background technology
Heat exchanger/catalyst normally has the channel system of main body, and this channel system is formed with a large amount of passage aisles arranged side by side, the fluid that for example will be converted or the fluid mixture described passage aisle of flowing through.This channel system is made from a variety of materials, for example ceramic material or metal (such as stainless steel or aluminium).
The channel cross-section of the channel system of being made by ceramic material is generally rectangle or polygon, such as hexagon.Described channel system is to make by the mode of extruding, and the cross section that this means passage is identical along the whole length of described passage, and described conduit wall will be smooth and flat.
When making the channel body of metal, usually corrugated ribbon (corrugated strip) and planar band (flat strip) are wrapped on the spool (spool).This causes channel cross-section is triangle or trapezoidal.Available most of metal-made channel system is identical along the cross section of whole length on the market, and has the smooth uniform conduit wall the same with ceramic channel body.This channel system of two types can coated, for example, is coated with catalytically-active materials (catalytically active material) in catalyst.
The most important thing is flow through in the channel system fluid of passage or heat, moisture and/or the mass transfer between fluid mixture and the conduit wall in the working environment.
In the channel system of the above-mentioned type, the channel system that for example is used for the internal combustion engine of vehicle or industry, have relatively little channel cross-section and usually use relatively little fluid velocity in these environment, fluid is moving with the laminar flow of relative rule (relatively regular) along passage.Therefore, described flowing is in fact (laminar) of laminar flow.Only have along in the short distance at feeder connection place, can produce some with respect to horizontal the flowing of conduit wall.
As known in the field, in flow and the conduit wall adjacent formation boundary layer of laminar flow, speed herein is zero basically.At first, in the situation that is considered to fully developed flow (fully developed flow), heat, moisture and/or mass transfer mainly occur by relatively slow diffusion, and described boundary layer has obviously reduced mass transfer coefficient.Mass transfer coefficient is the measurement of mass transport rates, and in order to obtain high efficiency heat exchange and/or catalytic conversion, mass transfer coefficient should be very large.In order to increase mass transfer coefficient, fluid is flowed towards the surface of channel side, reduce in the boundary layer like this, and increase one deck to the fluid transfer of another layer.This can realize by so-called turbulent flow.In smooth and uniform passage, when Reynolds number reaches about value more than 2000, laminar flow will become turbulent flow.If think to reach in the passage of the channel system that relates to the Reynolds number of magnitude like this here, just need to use than the much larger fluid velocity of common fluid speed in this working environment.Therefore, in the channel system of above-mentioned low reynolds number, need artificial means to make turbulent flow, as special air deflector is set in the passage.
US 4152302 discloses a kind of catalyst with passage, and in this converter, air deflector is with the form setting of the transverse metal wing of punching from metal tape.Catalytic converter with air deflector has significantly increased heat, moisture and/or mass transfer.Yet pressure drop also increases simultaneously sharp.And have been found that the impact that the pressure drop increase brings is larger than the impact that described heat, moisture and/or mass transfer increase bring.Wherein, structure, size and the geometry of air deflector depended in pressure drop.Yet, many weeks, the air deflector of described type produces excessive pressure drop, and therefore not by large-scale commercial the application.
EP 0869844 discloses turbulent flow generator, and this turbulent flow generator extends transverse to the conduit of catalyst or heat/moisture converter, with the pressure drop that is improved and the ratio of heat, moisture and/or mass transfer.
WO 2007/078240 discloses the flow transition device, and this flow-transfer device extends transverse to passage.Yet the manufacturer of this system always thinks further to improve the ratio of pressure drop and heat, moisture and/or mass transfer.
Summary of the invention
The object of the invention is to a kind of channel system, in this channel system, the ratio of pressure drop and heat, moisture and/or mass transfer can further improve.
Above-mentioned purpose realizes by the channel system with the feature that limits in additional claim.
Channel system of the present invention is for the pressure drop of the fluid of optimizing this system that flows through and the relation between heat, moisture and/or the mass transfer, and channel system comprises at least one passage with at least one conduit wall and has at least one air deflector of predetermined altitude.Air deflector is in the direction extension of Fluid Flow in A and transverse to passage.In addition, air deflector comprises upstream portion, downstream portion and the pars intermedia between upstream portion and downstream portion.Upstream portion departs to channel interior from conduit wall on fluid flow direction, and downstream portion returns towards conduit wall on fluid flow direction, and wherein, the transition between pars intermedia and downstream portion is crooked according to predetermined radii.Therefore curve transition between middle part and the downstream portion has reduced pressure drop, and has further improved the pressure drop of fluid of the channel system of flowing through and the ratio between heat, moisture and/or the mass transfer.The reduction of pressure drop caused the flowing through rate of flow of fluid of channel system increases, and the required electric energy of system reduces.This rising or constant one together with heat, moisture and/or mass transfer rate is worked, thereby makes system more efficient.In addition, when needs coating, the shaped form surface is just more favourable, because the coating that is attached on the lower surface has increased, and the coating of whole passage also may be more even.And the spark/burr that produces in the coating process still less.Spark/burr may be the deposit of material on certain point (such as on the sharp edge).Deposit is thicker than all the other coating, at high temperature uses and may cause deposit to come off during by vibration.In addition, in fact spark has increased pressure drop.Surface Paint Gloss can not only reduce pressure drop, and this also means the consumption that can reduce noble metal.Because production cost depends on the consumption of noble metal, thereby smooth surface can also reduce production costs.
Reduce pressure drop but increase heat, moisture and/or quality conversion by the guiding fluid, therefore the expansion owing to cross section produces fluid vortex (namely controlled turbulent motion), thereby has improved the quality of system.Turbulent motion is necessary for increasing heat, moisture and/or quality conversion.Preferably, the radius of the First Transition between pars intermedia and downstream portion is 0.1*h
1-2.1*h
1, be preferably 0.35*h
1-2.1*h
1, and 0.35*h more preferably
1-1.1*h
1
Suitably, the height of air deflector is passage 0.35 times of the height of measuring with the similarity direction of the first height.For the fluid-mixing fluid layer also produces the turbulent flow that can increase heat, moisture and/or mass transfer, it is necessary that this height tells on for the most of fluid at the passage of flowing through.
The pars intermedia of air deflector can comprise planar portions, and this planar portions is basically parallel to a conduit wall of passage.Planar portions is used on the direction that is parallel to passage and guides fluid.Can increase the fluid velocity that is parallel to channel direction like this.In order to make air deflector, also can need planar portions.Advantageously, on the direction of Fluid Flow in A, the length of planar portions is 0-2*H, preferably, is 0-2*h
1, and 0-1*h more preferably
1
Preferably, the transition between downstream portion and conduit wall is crooked according to predetermined radii.The radius of the transition between downstream portion and conduit wall is 0.5*h
1-1.7*h
1The purpose of this Radius is to prevent to occur the second eddy current behind air deflector.This unwanted the second eddy current can increase pressure drop but not increase heat, moisture and/or mass transfer.Therefore, by avoiding this eddy current can increase the ratio of pressure drop and heat, moisture and/or mass transfer.Like this, pressure drop is further reduced, thereby has improved the efficient of channel system.In addition, this level and smooth transition has prevented from producing in the spraying process spark/burr, therefore, this transition relate to spark/burr aspect with above-mentioned middle reaches section and downstream portion between transition have identical advantage.
Preferably, the 3rd transition between upstream portion and pars intermedia is crooked according to predetermined radii.Be like this for flow after upstream portion at level and smooth guiding fluid on the direction parallel with passage one side.Level and smooth guiding has further reduced pressure drop.The radius of the transition between upstream portion and pars intermedia can be 0.2*h
1-0.5*h
1In addition, this seamlessly transitting prevented the generation of spark/burr in the spraying process.Therefore, this transition relate to spark/burr aspect with above-mentioned middle reaches section and downstream portion between transition have identical advantage.Replacedly, can equal the radius of the transition between pars intermedia and the downstream portion at the radius of the transition between upstream portion and the pars intermedia.It is favourable that the radius that equates may flow to the application in the opposite direction of above-mentioned flow for fluid.
The transition of advantageously, establishing between the upstream portion of the conduit wall of passage and air deflector is crooked according to predetermined radii.This is in order to guide smoothly the Fluid Flow in A of laminar flow on transverse to channel direction, and this can increase because cross-sectional area reduces fluid velocity.In addition, this seamlessly transit to have stoped produce spark/burr in the spraying process.Therefore, this transition relate to spark/burr aspect with above-mentioned middle reaches section and downstream portion between transition have identical advantage.Preferably, conduit wall and the knuckle radius between the upstream portion at channel system can be 0.2*h
1-0.5*h
1
Suitably, the plane of the conduit wall that departs from respect to described upstream portion, the planar portions of upstream portion has the first inclination angle.This is in order to guide fluid towards the direction capable with difference between diversity channels, like this can be in order to increase heat, moisture and/or mass transfer turbulization.The first inclination angle can be 10 °-60 °, and more preferably is 30 °-50 °.
Preferably, the plane of the conduit wall that returns with respect to downstream portion, the planar portions of downstream portion has the second inclination angle.This is in order to increase eddy current, i.e. the controlled turbulent motion of fluid, and this turbulent motion is owing to cross section different (divergent) causes.This turbulent motion is necessary for increasing heat, moisture and/or mass transfer rate.Preferably, the second inclination angle is 50 °-90 °, more preferably is 60 ± 10 °.
Suitably, passage has the first cross-sectional area A at the air deflector place
1, the second cross-sectional area A
2, wherein, A
1With A
2Ratio, i.e. A
1/ A
2, greater than 1.5, be preferably more than 2.5, more preferably, greater than 3.Ratio A
1/ A
2Size extremely important for generation of the needed flow velocity of required turbulent motion in passage, obtaining, so this ratio A
1/ A
2Also extremely important to increasing heat, moisture and/or mass transfer.
In a preferred embodiment of the invention, pars intermedia is still on the inboard of the conduit wall that upstream portion departs from.This is in order further to reduce pressure drop.
Passage can comprise at least one air deflector, and this at least one air deflector is with respect to described air deflector mirror image switch.When some channel settings together constantly, the air deflector of such mirror image switch increases heat, moisture and/or the mass transfer in the whole system.
According to a preferred embodiment of the present invention, the cross section of channel system can be peg-top, and is preferably triangle.From the angle of making, this shape is preferred.Especially, about unit are, the cross section of equilateral triangle can make along the friction loss of conduit wall minimum, and has provided like this maximum fluidity rate of each unit are.Therefore, in order to increase heat, moisture and/or mass transfer, the equilateral triangle cross section is preferred.
Usually, unless make clear and definite other definition here, the used noun of using in the claim can explain according to the common meaning in the technical field of place.All relate at least a example that is interpreted as element, device, part, mode, step etc. that "/described [element, device, part, mode, step etc.] " all should be opened herein, unless clearly state, any step disclosed herein all needn't be carried out according to disclosed exact sequence.
Other purposes of the present invention, Characteristics and advantages will be by hereinafter detailed open, appended claims and accompanying drawing describe in detail.
Description of drawings
To better understand above and other purpose of the present invention, Characteristics and advantages by following explanation to the preferred embodiment of the present invention and the description of nonrestrictive details.Herein, similar components is used identical Reference numeral.
Fig. 1 exemplifies the perspective view of reel of the present invention (roll);
Fig. 2 is the perspective view according to channel system partly open of the present invention;
Fig. 3 is the cross section of replacing the passage in the embodiment;
Fig. 4 is the sectional view that the top of two passages among Fig. 2 is stacked together;
Fig. 5 is the sectional view of seeing the passage Fig. 2 from an end of passage;
Fig. 6 exemplifies the layer that has passage in channel-length direction.
The specific embodiment
In order to exemplify current preferred embodiment, for a more detailed description to the present invention below in conjunction with schematic diagram.
Fig. 1 exemplifies the reel 1 that has according to channel system 2 of the present invention.Described reel 1 can (for example heat wheel, gas-cooled nuclear reactor, gas-turbine blade cooler or any other suitable equipment) be used for catalyst (catalyst) in heat exchanger.
Form passage 4(and see Fig. 6) corrugated ribbon (corrugated strip) 13 roll with at least one planar band 14 and form the cylinder with requirement diameter, this cylinder consists of the actual core of the channel system 2 in reel 1.Sawtooth 15 in the corrugated ribbon 13 stops the reel that forms flexible with the planar band 14 that substantially is the plane.That is, corrugated ribbon 13 and planar band 14 stops described with 12 and 13 different layers mutual dislocation.In addition, housing 3 is around channel system 2, and support passage system 2 keeps together, and it can be fastened in the adjacent structure.
Replacedly, a large amount of corrugated ribbons 13 and planar band 14 are seen Fig. 6 by the arrangement stratification of turning to form passage 4().For instance, this arrangement is suitable for heat-exchangers of the plate type.
Shown in Figure 2 is with the first air deflector 7 with respect to the perspective view of the partly open of the passage 4 of the second air deflector 8 of the first air deflector 7 mirror image reversals.Yet, more than one air deflector 7 and the 8 whole distribution of lengths along passage 4 are respectively arranged.The installation of dissimilar air deflectors is not only interchangeable, as shown in Figure 2, and is arbitrarily.Replacedly, can only use a kind of in two types the air deflector.In this case, air deflector is also along the whole distribution of lengths of passage 4. Air deflector 7 and 8 can be guided through in predetermined direction the fluid that entrance 5 flows into.
The length of passage 4 can vary depending on the application.For example, for catalyst, the length of passage 4 can be 150-200mm, and for heat exchanger, the length of passage 4 can be 150-250mm.Yet the present invention is not limited to above-mentioned length.And, in order to form the system with Len req, can be with channel system 2 arranged in succession of any amount.
In addition, passage 4 axially can be any direction.Namely, the present invention is not limited to the horizontal channel.
The first air deflector 7 is installed on the conduit wall 6a of passage 4, and like this, the fluid (arrow) that flows into from entrance 5 just is guided to two other passage side 6b, 6c.Opposition side at the first air deflector 7 is projection 12.The air deflector 7,8( air deflector 7 and 8 that has a special geometry by use each other and and the entrance 5 of passage 4 between have predetermined distance), obtained the optimization relation between heat, moisture and/or mass transfer and the pressure drop.
By after the entrance 5, flow has the entrance turbulent flow at fluid.This turbulent flow is crossed passage along with flow and is reduced, and so just forms the laminar flow flow (laminar fluid flow) with constant speed in passage 4.When fluid during near first fluid controller 7, speed increases partly because cross section reduces.After the fluid control 7 of flowing through because cross section becomes large and the speed increase has produced eddy current, i.e. the turbulent motion of controlled (controlled) of fluid.Air deflector 7 affects the major part of the fluid of the passage 4 of flowing through, and causes the fluid layer (flow layer) of fluid to mix.This turbulent motion is necessary for increasing heat, moisture and/or mass transfer rate.
In Fig. 3, the adjacent installation of air deflector 7a, 7b of the same type.Air deflector 7 extends inward into passage 4, and has upstream portion 9, pars intermedia 10 and downstream portion 11.Air deflector 7a and 7b highly are h
1The first air deflector 7a is installed in apart from entrance 5 and is the place of A.The best position of the first air deflector 7a is decided according to current operating environment.
Upstream portion 9 comprises planar portions 21, and with respect to the plane of conduit wall 6a, this planar portions 21 has the first predetermined inclined angle alpha
1, planar portions 21 is the first predetermined inclined angle alpha of edge on the direction of Fluid Flow in A
1Depart from.The first inclined angle alpha
1Be defined as plane, conduit wall 6a place and planar portions 21 with respect to the angle between the extended surface on plane, conduit wall 6a place, this angle is positioned at the downstream on the crosspoint on the extended surface of planar portions 21 and plane, conduit wall 6a place.The first inclined angle alpha
1Also be defined as the angle α among Fig. 3
1In addition, the first inclined angle alpha
1Be 10 °-60 °, and be preferably 30 °-50 °.
The gradient of upstream portion 9 has increased fluid velocity, and guides fluid towards other surfaces, has so just activated controlled turbulent motion, to increase heat, moisture and/or mass transfer.
Pars intermedia 10 is installed between upstream portion 9 and the downstream portion 11.Pars intermedia 10 is still in the inboard of passage 6, and upstream portion 9 extends from this passage 6.Replacedly, pars intermedia 10 can be in inboard and the outside of conduit wall 6.
Has predetermined radii R
2The transition 19 of bending be installed between pars intermedia 10 and the upstream portion 9.The radius R of the transition 19 between pars intermedia 10 and upstream portion 9
2For the 0.1-2 of air deflector 7 height doubly, that is, and 0.1*h
1-2*h
1This is for can be smoothly after flow is by upstream portion that direction of flow is parallel with a side of passage direction guiding.For the embodiment with minimum preferred channel height H, radius R
2Equal 0.04-1.08mm.For the embodiment with maximum preferred high channel degree H, radius R
2Equal 0.14-4.31mm.
Pars intermedia 10 comprises planar portions 16, and this planar portions 16 is parallel to a conduit wall 6a of passage 4, and shorter with respect to the length of upstream portion 9 and downstream portion 11.And air deflector 7 is with respect to the maximum height h of conduit wall 6
1On the planar portions 16 on pars intermedia 10, air deflector 7 extends from conduit wall 6.Height h
1Preferably 0.35 of the height H of passage 4 times.For the embodiment with minimum preferred channel height H, this height h
1Equal 0.35-0.54mm.For the embodiment with maximum preferred channel height H, this height h
1Equal 1.40-2.15mm.Planar portions 16 can be for making former thereby produce, yet, this planar portions 16 also at fluid by upstream portion 9 guiding direction (namely being parallel to conduit wall 6a, the 6b of passage 4 and the direction of 6c) aid in guide fluid along passage 4 behind relative conduit wall 6b and the 6c.The length of planar portions 16 on the direction of Fluid Flow in A can be 0-2*H, is preferably 0-2.0h
1, and 0-1.0h more preferably
1The planar portions 16 of pars intermedia 10 can tilt with respect to conduit wall 6a, rather than parallel with conduit wall 6, and upstream portion 9 extends from this conduit wall 6.On the direction of Fluid Flow in A, this inclination can be not only in the inside of passage 4 but also towards conduit wall 6a.In another embodiment, pars intermedia 10 can have the profile of slight bending, for example convex.Transition 17,19 must not be bent to the direction that will be directed.
The downstream portion 11 of air deflector 7 comprises planar portions 22, and on the direction of Fluid Flow in A, this planar portions 22 is with the second predetermined inclined angle alpha with respect to plane, conduit wall 6a place
2Backward channel wall 6a.The second inclined angle alpha
2Be defined as plane, conduit wall 6a place and planar portions 22 to the angle between the extended surface on plane, conduit wall 6a place, this angle is positioned at the upstream of the intersection point on the extended surface of planar portions 22 and plane, conduit wall 6a place.The second inclined angle alpha
2Can also be defined as the angle α among Fig. 3
2In addition, the second inclined angle alpha
2Be 50 °-90 °, be preferably 60 ± 10 °.Preferably, planar portions 22 is enough short, and downstream portion 11 can turn back to conduit wall 6a in level and smooth transition 18 like this, and transition 18 preferably has large radius R
4Because cross section enlarges, planar portions 22 allows fluid to produce controlled turbulent motion, and this controlled turbulent motion will be optimized the ratio between heat, moisture and/or mass transfer and the pressure drop.
The predetermined radii R of the transition 17 between pars intermedia 11 and described downstream portion
3For the 0.1-2.1 of air deflector 7 height doubly, i.e. 0.1*h
1-2.1*h
1, be preferably the 0.35-2.1 of air deflector 7 height doubly, i.e. 0.35*h
1-2.1*h
1, and, more preferably the 0.35-1.1 of air deflector 7 height doubly, i.e. 0.35*h
1-1.1*h
1For the embodiment with minimum preferred channel height H, these several values are respectively 0.04-1.13mm, 0.12-1.13mm and 0.12-0.59mm.For the way of example with maximum preferred channel height H, these several values are respectively 0.14-4.52mm, 0.49-4.52mm and 0.49-2.37mm.This radius with the guiding of the major part of fluid to conduit wall 6a to make eddy current, i.e. the in check stream motion of fluid, producing this controlled turbulent motion is necessary for increasing heat, moisture and/or mass transfer rate.
Replacedly, the described radius R of the transition 19 between described upstream portion 9 and described pars intermedia 10
2Can equal the radius R of the transition 17 between described pars intermedia 10 and described downstream portion 11
3Namely, radius R
2For the 0.1-2.1 of air deflector 7 height doubly, i.e. 0.1*h
1-2.1*h
1, be preferably the 0.35-2.1 of air deflector 7 height doubly, i.e. 0.35*h
1-2.1*h
1, and, more preferably the 0.35-1.1 of air deflector 7 height doubly, i.e. 0.35*h
1-1.1*h
1For the embodiment with minimum preferred channel height H, these several values are respectively 0.04-1.13mm, 0.12-1.13mm and 0.12-0.59mm.For the embodiment with maximum preferred channel height H, these several values are respectively 0.14-4.52mm, 0.49-4.52mm and 0.49-2.37mm.Above-mentioned equal radius is favourable to some application, and in these were used, fluid may flow along the opposite direction of above-mentioned direction.
That level and smooth transition 20 has predetermined radii R between the conduit wall 6a of passage 4 and upstream portion 9
1At the conduit wall 6a of passage 4 and the radius R of the transition 20 between the upstream portion 9
1Help upwards to guide fluid admission passage 4 and this radius R
1The height h of air deflector 7
10.1-2 doubly, that is, and 0.1*h
1-2*h
1For the embodiment with minimum preferred channel height H, this value equals 0.04-1.08mm, and for the embodiment with maximum preferred channel height H, this value equals 0.14-4.13mm.
Consider the ratio of pressure drop and heat, moisture and/or mass transfer, lay respectively between conduit wall 6a and the upstream portion 9 and the radius R of the transition between upstream portion 9 and the pars intermedia 10
1And R
2Optimum value can determine by using some empirical parameters.Such as these parameters are the cross-sectional area A of the passage 4 at air deflector 7,8 places
1Cross-sectional area A with passage 4
2Ratio, in cross-section variation and the cross-sectional area A of air deflector 7,8 place's passages 4
1Ratio, and upstream portion 9 and downstream portion 11 the first and second inclined angle alpha separately
1, α
2The cross-sectional area A of passage 4
1Be defined as the cross section at entrance 5 places of passage 4.The cross-sectional area A of passage 4
1Also can be defined as the A among Fig. 5
1 Passage 4 is in the cross-sectional area A at air deflector 7,8 places
2The height that is defined as pars intermedia 10 is h
1The cross-sectional area at place.The cross-sectional area A of passage 4
2Also can be defined as the A among Fig. 5
2If pars intermedia is not parallel to conduit wall 6, upstream portion 9 extends cross-sectional area A from this conduit wall 6
2The average cross-section that is defined as pars intermedia 10 is long-pending.
Level and smooth transition 18 is between the conduit wall 6a of downstream portion 11 and passage 4, and this transition 18 has radius R
4Described radius R
4Cut down the formation of the second eddy current, otherwise the second eddy current can increase pressure drop.Radius R
4Be air deflector 7 height 0.2-2 doubly, that is, and 0.2h
1-2h
1, and be preferably air deflector 7 height 0.5-1.5 doubly, that is, and 0.5h
1-1.5h
1For the embodiment with minimum preferred channel height H, this value is respectively 0.01-2.15mm, and 0.18-0.81.For the embodiment with largest passages height H, this value equals respectively 0.03-8.62mm and 0.70-3.23mm.Yet transition 18,20 is not limited to has radius, and they also can be straight.
Level and smooth transition 18,19,20 and 21 cause the flowing through flow of air deflector 7 is more level and smooth, and this transition guides fluid at specific direction simultaneously.Because pressure drop is because fricative between the conduit wall of fluid and passage, so level and smooth transition can also reduce pressure drop.
In Fig. 2 and Fig. 3, the upstream portion 9 of air deflector has planar portions 21.In another not shown embodiment, upstream portion 9 can comprise two relative bends, and does not have planar portions between these two bends.Namely, upstream portion 9 can form by the transition 20 of spill, and the transition 20 of this spill is between upstream portion continuous in conduit wall 6a and the transition 19 in convex, and the transition 19 of this convex is between upstream portion 9 and pars intermedia 10.Here, the first inclined angle alpha
1Refer to by the tangent line (seeing sectional view) of two bend deformation points and the angle between the plane, conduit wall 6a place.In other respects, the definition at the first inclination angle is similar with the situation with planar portions 21.
In another embodiment, downstream portion 11 can have the shape of spill or convex, and perhaps downstream portion 11 can comprise two relative bends, and does not have planar portions 22 between these two bends.That is, downstream portion 11 can form by the transition 17 of convex, and the transition 17 of this convex is between downstream portion continuous in pars intermedia and the transition 18 in spill, and the transition 18 of this spill is between downstream portion and conduit wall.In this case, the second inclined angle alpha
2Refer to by the tangent line (seeing sectional view) of two bend deformation points and the angle between the plane, conduit wall 6a place.In other respects, the definition at the first inclination angle is similar with the situation with planar portions 22.
In Fig. 3, the second air deflector 7b is positioned at apart from the place of the first air deflector 7a apart from B, and the second air deflector 7b and air deflector 7a have same geometric shape.Compare with the geometric shape of the first air deflector 7a, the second air deflector 7b can have different geometric shapes.Should be enough large apart from B, the turbulent motion that produces behind the first air deflector 7a at flow like this may be maximized utilization, and fluid can along the direction of passage 4, that is, be parallel to the conduit wall 6a-c of passage 4 like this.By this distance, need not reduce heat, moisture and/or mass transfer rate and just stop unnecessary pressure drop.The present invention is not limited to and is set to equidistance B between air deflector.On the contrary, between the air deflector can be any distance.
Projection 12 is installed above air deflector 7a and 7b.Preferably, the height h of projection 12
2Be less than the height h of air deflector 7
1Reduced so unnecessary turbulent flow in the projection 12.More preferably, the shape of projection 12 can well match with respective protrusions 12, and respective protrusions 12 is by the air deflector definition (see figure 4) at the second channel downside.Projection 12 highly preferred height prevents from stretching so that can stably install when passage is installed in layering.Here flexiblely refer to each other unnecessary relatively moving of channel layer.The present invention is not limited to has a projection in each air deflector 7.As an alternative, such as, along on the fluid flow direction, can be provided with a projection at first air deflector 7, in the end an air deflector 7 is provided with a projection.
Shown in Figure 4 is two passages 4 that stack, and as in channel system 2, each passage 4 has the first air deflector 7 and and the second mirror image reversal air deflector 8 of the first air deflector 7.If only use the air deflector that extends into passage, when passage is rolled into reel or arranged superposed as shown in Figure 6, only have so the air deflector of half to be utilized.In order further to increase heat, moisture and/or mass transfer, making adaptably each second air deflector is that all like this passages all are provided with air deflector with respect to the air deflector 8 of air deflector 7 mirror image reversals.The second mirror image reversal air deflector 8 with respect to the first air deflector 7 is placed and the place of the first air deflector 7 at a distance of preset distance B.Should be enough large apart from B, the turbulent motion that produces behind the first air deflector 7 when flow like this can be maximized utilization, and fluid can be mobile along the direction of passage 4, that is and, the conduit wall 6 that is parallel to passage 4 flows.More the fluid near the second mirror image reversal air deflector obtains large expanding area (expansion area), and can reduce speed in the part.
Fig. 5 is the sectional view of seeing the passage Fig. 2 from an end of passage, and exemplifying cross section is how to be affected by the sawtooth 15 of both sides.Exemplify the first air deflector 7 and mirror image reversal air deflector 8 among the figure, and this first air deflector 7 and mirror image reversal air deflector 8 extend (see figure 1) at whole conduit wall 6a.The cross section of passage is triangle, but any peg-top cross section all is suitable.Like this, the trapezoid cross section also is feasible.
In order to increase the turbulent motion that needs, fluid has specific speed v at pars intermedia 10 places of air deflector 7
2Necessary.Speed v
2The cross-sectional area A that depends on pars intermedia 10 places
2, passage 4 cross-sectional area A
1Has cross-sectional area A with passage
1The speed v of part
1The porch of passage (for example).By using formula A
2=A
1* (v
1)
2/ v
2, most preferred area A
1And A
2Ratio (be A
1/ A
2) can calculate according to being used for.Area A
1And A
2Ratio greater than 1.5, be preferably more than 2.5, and more preferably, greater than 3.
According to a substitute mode of the present invention, air deflector is installed by this way: the pars intermedia between described upstream portion and downstream portion is parallel with a side (side) of the triangular-section of passage, and air deflector extends from this side.In the another one substitute mode, air deflector is installed by this way: the pars intermedia between upstream portion and downstream portion is vertical with a leg-of-mutton side of the triangular cross section of passage.This means that upstream portion and downstream portion tilt with respect to the both sides of passage respectively, the side that not only departs from respect to air deflector is also with respect to adjacent side.In another substitute mode, air deflector can be installed in such a way: the sidepiece of pars intermedia (side portion) tilts with respect to the side that air deflector departs from, that is, air deflector forms the nonreentrant surface with four inclined lateral side.Replacedly, an air deflector can extend from a conduit wall 6a, returns another conduit wall 6b, and perhaps air deflector can extend and return different conduit walls in any order from conduit wall 6a-c.For example, just can there be one from conduit wall 6a, to extend every two air deflectors, and can from remaining two conduit wall 6b, c, extends successively at these air deflectors between the extended air deflector of conduit wall 6a.Remain at one and replace in the embodiment, air deflector can be upper apart from passage 4 entrances or apart from air deflector 7,8 equidistant the extending of passage middle and upper reaches from two or more conduit wall 6a-c.This has caused the passage between some conduit walls very narrow.Such air deflector can exemplify in the drawings in conjunction with air deflector 7,8.
Fig. 6 exemplifies on according to the longitudinal direction of passage of the present invention layer with the passage 2 in the channel system.The preferred corrugated ribbon 13 that uses, in corrugated ribbon 13, air deflector 7,8 is extruded from a side, has so not only formed sawtooth 15 but also has formed extrusion section at interior flanging at flanging.Herein sawtooth 15 and air deflector 7 mentioned above, 8 the same.In the present embodiment, used substantially to be the planar band 14 on plane, this planar band 14 also is formed with sawtooth 15 with corresponding with the sawtooth on the corrugated ribbon 13.Planar band 14 and corrugated ribbon 13 overlapping pressing together, the sawtooth 15 on the planar band 14 just can cooperate the sawtooth 15 in the corrugated ribbon 13 like this.
For extra increase heat, moisture and/or mass transfer, the passage that the end of the terminal downward passage of cross-sectional triangle and cross-sectional triangle is made progress all is provided with sawtooth/extrusion section, so just causes all passages all to have air deflector.Therefore, have the passage of air deflector for all, thereby, sawtooth/extrusion section conveniently is set in both sides, inwardly press at the base portion of the cross-sectional triangle of passage, cross-sectional area is reduced.The end of cross-sectional triangle point to respectively inside or outside passage sawtooth/extrusion section compensates mutually along passage, and preferably, this sawtooth/extrusion section equidistantly arranges each other.Thereby, be arranged in cross section along its difference at same passage, the sawtooth of the end of the sawtooth of base portion of the triangle of triangle shaped tip/extrusion section and the triangle of triangular base/extrusion section is arranged.This has mainly reduced cross-sectional area, thereby helps turbulization.This means the basis has inwardly been produced most turbulent flow towards the part of channel center extruding, because this position that to be cross-sectional area reduce.On the contrary, inwardly towards the part place of the outside extruding of channel center's extruding and basis, cross-sectional area can increase in triangle shaped tip.
Although by having described foregoing invention in conjunction with the preferred embodiment of the present invention, clearly, those skilled in the art can expect multiple modification and not break away from the present invention that additional claim limits.For example, as mentioned above, corrugated ribbon can be processed ripple by other means, can obtain like this other passage profile.If the structure of air deflector does not comprise flexible obstacle, for example, upstream portion and downstream portion are little with respect to the angle of passage longitudinal direction, just can obtain having the special sawtooth of less acute angle/extrusion section with respect to the passage longitudinal direction.Like this, compare with the air deflector for minimum pressure drop, these flexible obstacles also diminish, and namely the cross-sectional area than passage is little.Certainly, these flexible obstacles can replenish those air deflectors that has served as flexible obstacle.The quantity of sawtooth/air deflector depends on and the length of passage and the cross-sectional area A of passage
1In order to optimize the ratio between pressure drop and heat, moisture and/or the mass transfer, the passage of small bore needs less air deflector spacing than heavy in section passage, and more air deflector.And from the angle of making, being suitable for adopting can reusable preset distance for different application.For preferred embodiment, be the passage of 150mm for length, the quantity of air deflector can be 5-6.Yet the quantity of air deflector is never limited to several therewith.
Claims (25)
1. a channel system (2), this channel system (2) is for the pressure drop of the fluid of optimizing the described system that flows through and the relation between heat, moisture and/or the mass transfer, and described channel system (2) comprises at least one passage (4) with at least one conduit wall (6a) and has predetermined altitude (h
1) at least one air deflector (7,7a, 7b), described air deflector (7,7a, 7b) on fluid flow direction, extend transverse to described passage (4), described air deflector (7,7a, 7b) comprise upstream portion (9), downstream portion (11) and be positioned at described upstream portion (9) and described downstream portion (11) between pars intermedia (10), described upstream portion (9) departs from described passage (4) from described conduit wall (6a) on described fluid flow direction, described downstream portion (11) returns towards described conduit wall (6a) on described fluid flow direction, and the described transition (17) between described pars intermedia (10) and the described downstream portion (11) is according to predetermined radii (R
3) bending, it is characterized in that the transition (20) between the described conduit wall (6a) of described passage (4) and the described upstream portion (9) of described air deflector (7,7a, 7b) is according to predetermined radii (R
1) bending, wherein,
Described radius (the R of the described transition (20) between the described conduit wall of described passage (4) and the described upstream portion (9)
1) be the predetermined altitude (h of the described air deflector of 0.1* (7,7a, 7b)
1) to the predetermined altitude (h of the described air deflector of 2* (7,7a, 7b)
1).
2. channel system according to claim 1 (2), wherein, the described radius (R of the described transition (17) between described pars intermedia (10) and the described downstream portion (11)
3) be the predetermined altitude (h of the described air deflector of 0.1* (7,7a, 7b)
1) to the predetermined altitude (h of the described air deflector of 2.1* (7,7a, 7b)
1).
3. channel system according to claim 2 (2), wherein, the described radius (R of described transition (17)
3) be the predetermined altitude (h of the described air deflector of 0.35* (7,7a, 7b)
1) to the predetermined altitude (h of the described air deflector of 2.1* (7,7a, 7b)
1).
4. channel system according to claim 3 (2) is characterized in that, the described radius (R of described transition (17)
3) be the predetermined altitude (h of the described air deflector of 0.35* (7,7a, 7b)
1) to the predetermined altitude (h of the described air deflector of 1.1* (7,7a, 7b)
1).
5. channel system according to claim 1 (2), wherein, described pars intermedia (10) comprises planar portions (16), this planar portions (16) is basically parallel to the described conduit wall (6a) of described passage (4).
6. channel system according to claim 5 (2), wherein, the length of described planar portions (16) on described fluid flow direction is the height (H) of 0 to 2* described passage.
7. channel system according to claim 6 (2), wherein, the length of described planar portions (16) on described fluid flow direction is the predetermined altitude (h of 0 to 2* described air deflector (7,7a, 7b)
1).
8. channel system according to claim 7 (2), wherein, the length of described planar portions (16) on described fluid flow direction is the predetermined altitude (h of 0 to 1.0* described air deflector (7,7a, 7b)
1).
9. channel system according to claim 1 (2), wherein, the transition (18) between described downstream portion (11) and the described conduit wall (6a) is according to predetermined radii (R
4) bending, this radius (R
4) be the predetermined altitude (h of the described air deflector of 0.5* (7,7a, 7b)
1) to the predetermined altitude (h of the described air deflector of 1.5* (7,7a, 7b)
1).
10. channel system according to claim 1 (2), wherein, the transition (19) between described upstream portion (9) and the described pars intermedia (10) is according to predetermined radii (R
2) bending.
11. channel system according to claim 10 (2), wherein, the described radius (R of the described transition (19) between described upstream portion (9) and the described pars intermedia (10)
2) be the predetermined altitude (h of the described air deflector of 0.1* (7,7a, 7b)
1) to the predetermined altitude (h of the described air deflector of 2* (7,7a, 7b)
1).
12. channel system according to claim 10 (2), wherein, the described radius (R of the described transition (19) between described upstream portion (9) and the described pars intermedia (10)
2) and described pars intermedia (10) and described downstream portion (11) between the described radius (R of described transition (17)
3) equate.
13. channel system according to claim 1 (2), wherein, the plane of the described conduit wall (6a) that departs from respect to described upstream portion (9), the planar portions (21) of described upstream portion (9) has the first inclination angle (α
1).
14. channel system according to claim 13 (2), wherein, described the first inclination angle (α
1) be 10 °-60 °.
15. channel system according to claim 14 (2), wherein, described the first inclination angle (α
1) be 30 °-50 °.
16. channel system according to claim 1 (2), wherein, the plane of the described conduit wall (6a) that returns with respect to described downstream portion (11), the planar portions (22) of described downstream portion (11) has the second inclination angle (α
2).
17. channel system according to claim 16 (2), wherein, described the second inclination angle (α
2) be 50 °-90 °.
18. channel system according to claim 17 (2), wherein, described the second inclination angle (α
2) be 60 ± 10 °.
19. channel system according to claim 1 (2), wherein, described passage (4) locates to have the first cross-sectional area A at described air deflector (7,7a, 7b)
1With the second cross-sectional area A
2, wherein, the first cross-sectional area A
1With the second cross-sectional area A
2Ratio, i.e. A
1/ A
2, greater than 1.5.
20. channel system according to claim 19 (2), wherein, described the first cross-sectional area A
1With the second cross-sectional area A
2Ratio greater than 2.5.
21. channel system according to claim 20 (2), wherein, described the first cross-sectional area A
1With the second cross-sectional area A
2Ratio greater than 3.
22. channel system according to claim 1 (2), wherein, described pars intermedia (10) is still on the inboard of the described conduit wall (6a) that described upstream portion (9) departs from.
23. channel system according to claim 1 (2), wherein, described passage (4) comprises at least one mirror image reversal air deflector (8), and this at least one mirror image reversal air deflector (8) is with respect to described air deflector (7,7a, 7b) mirror image switch.
24. according to the described channel system of above-mentioned any one claim (2), wherein, the cross section of described passage (4) is top in shape.
25. channel system according to claim 24 (2), wherein, the cross section of described passage (4) is triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104736585A CN102980424A (en) | 2008-04-18 | 2008-04-18 | Channel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104736585A CN102980424A (en) | 2008-04-18 | 2008-04-18 | Channel system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801286969A Division CN102007364B (en) | 2008-04-18 | 2008-04-18 | Channel system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102980424A true CN102980424A (en) | 2013-03-20 |
Family
ID=47854669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104736585A Pending CN102980424A (en) | 2008-04-18 | 2008-04-18 | Channel system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102980424A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2011756A (en) * | 1931-09-30 | 1935-08-20 | Nicholas S Diamant | Radiator core structure |
| DE3744265A1 (en) * | 1987-12-24 | 1989-07-13 | Sueddeutsche Kuehler Behr | Soot filter for the purification of exhaust gas in motor vehicles |
| CN1204972A (en) * | 1995-12-13 | 1999-01-13 | 斯万·梅尔克·尼尔松 | Turblulence indducer in chemical reactor |
| CN1432123A (en) * | 2000-06-15 | 2003-07-23 | 斯万·梅尔克·尼尔松 | Device for heat/moist exchange |
| WO2007078240A1 (en) * | 2006-01-02 | 2007-07-12 | Sven Melker Nilsson | Channel system |
-
2008
- 2008-04-18 CN CN2012104736585A patent/CN102980424A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2011756A (en) * | 1931-09-30 | 1935-08-20 | Nicholas S Diamant | Radiator core structure |
| DE3744265A1 (en) * | 1987-12-24 | 1989-07-13 | Sueddeutsche Kuehler Behr | Soot filter for the purification of exhaust gas in motor vehicles |
| CN1204972A (en) * | 1995-12-13 | 1999-01-13 | 斯万·梅尔克·尼尔松 | Turblulence indducer in chemical reactor |
| CN1432123A (en) * | 2000-06-15 | 2003-07-23 | 斯万·梅尔克·尼尔松 | Device for heat/moist exchange |
| WO2007078240A1 (en) * | 2006-01-02 | 2007-07-12 | Sven Melker Nilsson | Channel system |
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Application publication date: 20130320 |