CN101963171B - T-shaped splitting/rectifying tee - Google Patents
T-shaped splitting/rectifying tee Download PDFInfo
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- CN101963171B CN101963171B CN2010105203362A CN201010520336A CN101963171B CN 101963171 B CN101963171 B CN 101963171B CN 2010105203362 A CN2010105203362 A CN 2010105203362A CN 201010520336 A CN201010520336 A CN 201010520336A CN 101963171 B CN101963171 B CN 101963171B
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Abstract
The invention discloses a T-shaped splitting/rectifying tee, which comprises an inlet section and two outlet sections, wherein one outlet sections and the inlet section are on a same horizontal plane, and the plane on which the extension line of the other outlet section is arranged is perpendicular to the plane on which the inlet section is arranged, thereby forming a T-shaped structure; the inlet section is communicated with one outlet section through a horizontal connection end of a splitting section, the longitudinal connection end of the splitting section is communicated with a buffering section, and the lower end of the buffering section is provided with a rectifying section which is communicated with the other outlet section; rectifying vanes are arranged in the upper part of the rectifying section, and each rectifying vane is provided with a guide vane which divides the inner portion of the rectifying section into five fluid channel with equal flow. The T-shaped splitting/rectifying tee of the invention eliminates the speed layering formed after fluid flows through the T-shaped tee, thereby finally achieving the purpose of rectifying the fluid after the liquid flows through the T-shaped tee.
Description
Technical field
The present invention relates to a kind of local member in a kind of ventilation and air conditioning system, particularly a kind of rectangular cross section T type shunting rectification threeway.
Background technique
The threeway of T type is the change direction of flow very common in the HVAC motive fluid machinery and the pipe fitting of shunting; In distribution pipeline; Because the turning of fluid; Occurred from the centrifugal force of centre of curvature to the pipe outer arced surface, this with regard to make fluid from the straightway of pipeline carry out the transition to bending tube section (turn round finish before) time, the increased pressure of outer arced surface and the pressure reduction of intrados.So flow rate of fluid will reduce at the outer arced surface place, and flow rate of fluid correspondingly increases at the intrados place.Therefore, diffusion effect occurs at the outer arced surface annex, and blockage effect occurring near the intrados place.When fluid carries out the transition to straight length (back of turning round) from bending tube section, there is opposite phenomenon to take place again, promptly produces diffusion effect near the intrados, produce blockage effect near the outer arced surface.Diffusion effect makes fluid break away from wall, and the bending tube section fluid is owing to the motion that inertia flows to outer arced surface has more aggravated the separation from intrados simultaneously.
Owing to above reason, fluid is after flowing through threeway of T type and shunting, and fluid can be because diffusion and blockage effect and layering is as shown in Figure 1, and this flow velocity that can cause fluid right side shown in the figure is greater than the left side.This just means that rate of flow of fluid is inhomogeneous.At field of heating ventilation air conditioning, can vibration take place and produce noise on the one hand at pipe interior; On the other hand, if this part fluid is directly sent into the room, influence indoor comfort thereby can cause indoor air flow tissue and design to run counter to.
Summary of the invention
The purpose of this invention is to provide a kind of T type shunting rectification threeway, the unique design of this T type shunting rectification threeway has been eliminated fluid through formed speed layering after the threeway of T type, thereby finally reaches the purpose of carrying out rectification to through the fluid after the threeway of T type.
In order to realize above-mentioned technical assignment, the present invention adopts following technological scheme to be achieved:
A kind of rectangular cross section T type shunting rectification threeway; Comprise entrance and two outlet sections, one of them outlet section and entrance are on the same horizontal plane, and plane, the elongation line of another outlet section place belongs to the plane perpendicular to entrance; Constitute the T font structure; Entrance links to each other with an outlet section through the horizontal connecting end of shunting section, and vertical connecting end of shunting section links to each other with breeze way, is provided with the rectification section that links to each other with another outlet section in the breeze way downstream; Upstream extremity is provided with straightener(stator) blade in the described rectification section, has guide vane on each straightener(stator) blade with being divided into five fluid passages of waiting flow in the rectification section.
Other technologies characteristics of the present invention are:
Described breeze way length is identical with the entrance channel width.
It vertically is acute triangle to described straightener(stator) blade along rectification section, and with coming flow path direction certain inclination angle is arranged, and makes to form five fluid passages that inlet varies in size in the rectification section.
Described guide vane comes flow path direction to be acute triangle dorsad, and vertically is parallel to each other with rectification section.
In addition, design the inlet size of five fluid passages that form between above-mentioned rectangular cross section T type shunting rectification interior each straightener(stator) blade of threeway rectification section and the rectification section longitudinal direction and confirm method, it is characterized in that this method comprises the steps:
Step 1, confirm the fluid flow fields state in the rectangular cross section T type diversion three-way; According to two outlet section line sizes and entrance liquid speed; The operation reynolds stress model also combines the SIMPLE algorithm; Simulate then velocity field in the rectification section front T type diversion three-way pipeline is set, thereby obtain the velocity distribution value of rectification section position fluid;
The inlet of step 2, five fluid passages confirming to form between rectangular cross section T type shunting rectification each straightener(stator) blade of threeway and the rectification section longitudinal direction is big or small; The velocity distribution value of the rectification section position fluid of trying to achieve according to step 1; Utilize area branch principle, try to achieve five fluid passages inlet sizes when satisfying each fluid passage inner fluid flow the same terms.
By above visible; The present invention at first shunts through the shunting section convection cell; Make in the breeze way before fluid gets into outlet, fluid cushions in breeze way, after formation has metastable fluid characteristics; Wait the flow cutting through five fluid passage convection cells that vary in size that form between straightener(stator) blade and the rectification section again, and through forming the transverse velocity of five equal and opposite in direction passage eliminate fluids between guide vane and the housing.Thereby eliminate fluid finally reaches the purpose of carrying out rectification to through the fluid after the threeway of T type through formed speed layering after the threeway of T type, and is as shown in Figure 2.
Description of drawings
Fig. 1 is the flow velocity isoline map during through traditional T type threeway for fluid;
Fig. 2 is the flow velocity isoline map when fluid is through the threeway of T type after the installation T type shunting of the present invention rectification threeway;
Fig. 3 is a structural representation of the present invention;
Fig. 4 is traditional T type threeway outlet section transverse section liquid speed distribution integrogram;
Fig. 5 is the T type shunting rectification threeway outlet section velocity contour of the embodiment of the invention
The following information of each symbolic representation among the figure: 1, entrance; 2, shunting section; 3, straightener(stator) blade; 4, guide vane; 5, outlet section; 6,7,8, straightener(stator) blade; 9, breeze way; 10, outlet section; 11, rectification section; Other, the direction of arrow is represented fluid flow direction.
Below in conjunction with accompanying drawing particular content of the present invention is done explanation in further detail.
Embodiment
As shown in Figure 3; Rectangular cross section T type shunting rectification threeway; Comprise entrance 1 and two outlet sections (5,10), one of them outlet section 10 is on the same horizontal plane with entrance 1, and plane, the elongation line of another outlet section 5 place is perpendicular to plane, entrance 1 place; Constitute the T font structure; Entrance 1 links to each other with an outlet section 10 through shunting section 2 horizontal connecting ends, and vertical connecting end of shunting section 2 links to each other with breeze way 9, and being designed for of breeze way 3 guarantees to form in the three-way pipe of whole interflow the fluid with metastable fluid characteristics here.Be provided with the rectification section 11 that links to each other with another outlet section 5 in breeze way 9 downstream; Upstream extremity is provided with straightener(stator) blade (3,6,7,8) in the described rectification section 11; Have guide vane 4 on each straightener(stator) blade with the fluid passages that are divided into five flows such as grade in the rectification section 11, thereby realize the fluid in the whole diversion three-way pipeline is waited the flow cutting.
Because fluid is becoming unstable through flow characteristic after the break-in; For can being formed, it has metastable fluid characteristics; And then waiting flow cutting through five fluid passage convection cells that vary in size that form between straightener(stator) blade and the rectification section, the present invention is provided with the length breeze way identical with the entrance channel width before rectification section.
The problem that the resistance that causes for fear of cutting fluid increases; And more effectively convection cell cuts; It vertically is acute triangle to described straightener(stator) blade (3,6,7,8) along rectification section (11); And with coming flow path direction certain inclination angle is arranged, make to form five fluid passages that inlet varies in size in the rectification section (11).Surface of contact area when this type guide vane and fluid collision is littler, and the resistance to impact that has this to produce is also little, because the possibility of collision generation fluid swirling is also little.Can effectively reduce the caused resistance of cutting fluid with this.
The problem that the resistance that causes for fear of cutting fluid equally increases; And can carry out water conservancy diversion by effective more fluid to the straightener(stator) blade of flowing through; Described guide vane 4 comes flow path direction to be acute triangle dorsad; And vertically be parallel to each other with rectification section 11, after fluid is through shunting section 2 formed with come the perpendicular velocity component of flow path direction to be eliminated by guide vane 4, thereby eliminated that fluid forms vortexs through shunting section 2 backs and increase resistance maybe.
Owing to described expansion of preamble and contraction, it is big to form right side speed in position as shown in Figure 1, the speed layering that left side speed is little after fluid flows through the threeway of rectangular cross section T type.The present invention through reynolds stress model and combine that the SIMPLE algorithm drawn flow through the threeway of T type after rate of flow of fluid distribute and size; Confirm the spacing size between straightener(stator) blade and the housing, the fluid flow at each passage that makes fluid flow through behind the straightener(stator) blade is identical.Because the straightener(stator) blade convection cell cuts, fluid can be cut back formation vortex.Commutator lug among the present invention is under the big or small constant situation of cross section, and the transverse velocity of convection cell is offset, thereby eliminates its formed vortex, makes fluid only have longitudinal velocity.Thereby, reach the rectification purpose in the layering of the speed of elimination.
The present invention designs the inlet size of five fluid passages that form between above-mentioned rectangular cross section T type shunting rectification threeway rectification section 11 interior each straightener(stator) blade (3,6,7,8) and rectification section 11 longitudinal directions and confirms method, and this method comprises the steps:
Step 1, confirm the fluid flow fields state in the T type diversion three-way,, move reynolds stress model and also combine the SIMPLE algorithm according to two outlet sections (5,10) line size and entrance section 1 liquid speed.
At first, find the solution momentum equation:
Find the solution pressure modified continuous property equation then:
ρ is a fluid density; u
i, u
jBe speed, i, j are the tensor subscript, i, j=1,2,3; μ, μ
tBe dynamic viscosity, subscript t representes that this physical quantity is caused by the turbulent flow pulsation; σ
k, σ
τBe constant; C
μ, C
1, C
2Be empirical coefficient, its value is as shown in the table.
And upgrade pressure, just face mass flow rate and find the solution the Reynolds stress equation with this.And judge whether convergence, if convergence then stop to calculate, if would not do not restrain then continue to find the solution momentum equation.The RSM model constants, as shown in table 1:
Table 1. model constants
| Coefficient | C μ | C 1 | C 2 | σ k | σ ε |
| Numerical value | 0.09 | 1.44 | 1.92 | 1.0 | 1.3 |
Simulate then velocity field in the rectification section 11 front T types shunting rectification three-way pipeline is set, thereby obtain the velocity distribution of rectification section 11 position fluids.
The inlet of step 2, five fluid passages confirming to form between T type shunting rectification each straightener(stator) blade of threeway (3,6,7,8) and rectification section 11 longitudinal directions is big or small, and the velocity distribution of the rectification section 11 position fluids of trying to achieve according to step 1 is as shown in Figure 4.Obtain the velocity magnitude of each point in the cross section, position of rectification section 11; From left to right the distance of flow velocity and fluid and rectification section 11 inwalls is carried out integration; When flow satisfy total discharge 1/5 the time stop integration, the distance of being tried to achieve is the spacing that is provided with between distance and each straightener(stator) blade that is provided with of straightener(stator) blade and rectification section 11 inwalls.So just satisfy these five fluid passage inner fluid flows and all be communicate be all 1/5 of total discharge.Utilize area branch principle, thereby accomplish the setting of the size of five fluid passages inlets when satisfying each fluid passage inner fluid flow the same terms.
Specific embodiment:
Below provide specific embodiment of the present invention, need to prove that the present invention is not limited to following specific embodiment, all equivalents of on present techniques scheme basis, doing all fall into protection scope of the present invention.
Follow technique scheme, connect with the central air-conditioner airduct and use the optimizing process of T type diversion three-way to be example, at first confirm the size of T type shunting rectification three-way pipeline each several part; Entrance size 300mm * 300mm wherein; Two outlet section sizes are 300mm * 300mm, and the shunting section camber is 1.5, and rectification section length is 300mm; Straightener(stator) blade length in the rectification section is 100mm, and guide vane length is 300mm.
List the discrete scheme of momentum equation and equation of continuity then, use the simple method to find the solution, can draw the velocity distribution value of place, rectification section 11 positions fluid when never adding rectification section.Confirm rectification section ingress size, as shown in Figure 4, according to integral principle, the area that the curve among Fig. 4 surrounded and big or small for flow is that 7m/s is an example with the ingress wind speed, and total inlet mentions that flow is 7m/s * 300mm * 300mm=0.63m
3/ s.The present invention is altogether five runners, and then the fluid volume that flows through of each runner planted agent is 0.126m
3/ s.Therefore, as long as the left end from Fig. 4 carries out integration along channel width successively to right-hand member, integration stops to get final product when integral value reaches 0.126m3/s.Through calculating when width reaches 80mm, 40mm, 50mm, 60mm, 70mm respectively from left to right successively, the volume flowrate integral value in its each runner is all 0.126m
3/ s (at this moment, the mean velocity in five runners is followed successively by 5.25m/s, 10.5m/s, 8.4m/s, 7m/s, 6m/s).The size that so just can determine ingress, five fluid passages is respectively 80mm * 300mm, 40mm * 300mm, 50mm * 300mm, 60mm * 300mm, 70mm * 300mm from left to right.Through this fluid cutting; Fluid flow in five fluid passages equates; So fluid passage outlet size also equates; Its fluid passage outlet size is followed successively by 60mm * 300mm, 60mm * 300mm, 60mm * 300mm, 60mm * 300mm, 60mm * 300mm (at this moment, the mean velocity in five runners is 7m/s) from left to right.
In theory of probability and mathematical statistics, variance (English Variance) is used for measuring the departure degree between stochastic variable and its mathematical expectation (being average).In many practical problems, the departure degree between research stochastic variable and the average has very important meaning.
Therefore, in order to analyze different that the present invention and traditional T type diversion three-way exit velocity distribute, introduce the notion of variance here it is carried out the analysis of flow speed stability property.
The speed variance of the present invention and traditional T type diversion three-way compares, and pipeline transverse section, traditional T type diversion three-way outlet port speed variance is 1.265459, and pipeline transverse section, outlet port of the present invention speed variance is 0.791196.Its velocity-stabilization degree carries 37.5%.
Meanwhile, through arrangement the present invention and traditional T type diversion three-way cross section velocity distribution value, as shown in Figure 5.The velocity distribution in outlet port of the present invention is obviously more even than traditional bend pipe, has so not only avoided tube fluid because of the uneven vibrating noise that causes of velocity flow profile but also can make the steady air current that gets into air-conditioned room, improves the comfort level of living space.
Claims (5)
1. rectangular cross section T type shunting rectification threeway; Comprise entrance (1) and two outlet sections (5,10); One of them outlet section (10) is on the same horizontal plane with entrance (1); The plane, elongation line place of another outlet section (5) constitutes the T font structure perpendicular to plane, entrance (1) place, and it is characterized in that: entrance (1) links to each other with an outlet section (10) through the horizontal connecting end of shunting section (2); Vertical connecting end of shunting section (2) links to each other with breeze way (9), is provided with the rectification section (11) that links to each other with another outlet section (5) in breeze way (9) downstream; The interior upstream extremity of described rectification section (11) is provided with straightener(stator) blade (3,6,7,8), has guide vane (4) on each straightener(stator) blade with being divided into five fluid passages of waiting flow in the rectification section (11).
2. rectangular cross section T type shunting rectification threeway according to claim 1, be characterised in that: breeze way (3) length is identical with entrance (1) channel width.
3. rectangular cross section T type shunting rectification threeway according to claim 1; Be characterised in that: it vertically is acute triangle to described straightener(stator) blade (3,6,7,8) along rectification section (11); And with coming flow path direction certain inclination angle is arranged, make to form five fluid passages that inlet varies in size in the rectification section (11).
4. rectangular cross section T type shunting rectification threeway according to claim 1, be characterised in that: described guide vane (4) comes flow path direction to be acute triangle dorsad, and vertically is parallel to each other with rectification section (11).
In the rectangular cross section T type shunting rectification threeway rectification section (11) that designs claim 1 each straightener(stator) blade (3,6,7,8) and rectification section (11) vertically between the method for inlet of five fluid passages of formation; It is characterized in that this method comprises the steps:
Step 1, confirm the fluid flow fields state in the rectangular cross section T type diversion three-way: according to two outlet sections (5,10) line size and entrance liquid speed; The operation reynolds stress model also combines the SIMPLE algorithm; Simulate then velocity field in rectification section (11) the front T type diversion three-way pipeline is set, thereby obtain the velocity distribution of rectification section (11) position fluid;
The inlet of step 2, five fluid passages confirming to form between rectangular cross section T type shunting rectification each straightener(stator) blade of threeway (3,6,7,8) and rectification section (11) longitudinal direction is big or small; The velocity distribution of rectification section (11) the position fluid of trying to achieve according to step 1; Utilize area branch principle, try to achieve five fluid passages inlet sizes when satisfying each fluid passage inner fluid flow the same terms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105203362A CN101963171B (en) | 2010-10-26 | 2010-10-26 | T-shaped splitting/rectifying tee |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105203362A CN101963171B (en) | 2010-10-26 | 2010-10-26 | T-shaped splitting/rectifying tee |
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| Publication Number | Publication Date |
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| CN101963171A CN101963171A (en) | 2011-02-02 |
| CN101963171B true CN101963171B (en) | 2012-02-01 |
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| CN2010105203362A Expired - Fee Related CN101963171B (en) | 2010-10-26 | 2010-10-26 | T-shaped splitting/rectifying tee |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107725945B (en) * | 2017-09-22 | 2020-03-10 | 西安建筑科技大学 | Low-resistance three-way component based on dissipation rate control |
| CN107676563B (en) * | 2017-09-22 | 2019-08-02 | 西安建筑科技大学 | Lower resistance threeway component based on bionics plant branched structure |
| CN108386983B (en) * | 2018-02-06 | 2020-05-19 | 西安建筑科技大学 | Low-resistance shunt three-way component for ventilation air conditioner air pipe |
| CN108644993B (en) * | 2018-03-26 | 2020-09-15 | 湘潭大学 | Low flow resistance pipeline device capable of uniformly supplying air |
| CN110425312B (en) * | 2019-07-30 | 2020-11-17 | 辽宁工程技术大学 | Air-conditioning type three-way rectifier valve |
| CN111829152A (en) * | 2020-07-22 | 2020-10-27 | 青岛海尔空调电子有限公司 | Refrigerant rectifier tube and air conditioner indoor unit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1557612A (en) * | 1976-10-04 | 1979-12-12 | Hargreaves & Sons Ltd Henry | Air turning assemblies for ducting |
| US5197509A (en) * | 1990-06-06 | 1993-03-30 | Cheng Dah Y | Laminar flow elbow system and method |
| CN2189230Y (en) * | 1994-02-07 | 1995-02-08 | 王文芳 | Device for guiding and adjusting air flow of electric fan |
| DE69520700T2 (en) * | 1994-02-10 | 2001-08-09 | Michihiko Kawano | Pipe elbow with guide vanes |
| US5529084A (en) * | 1994-03-24 | 1996-06-25 | Koch Engineering Company, Inc. | Laminar flow elbow system and method |
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