CN102589837A - Large fluid pressure wind tunnel - Google Patents
Large fluid pressure wind tunnel Download PDFInfo
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- CN102589837A CN102589837A CN2012100282776A CN201210028277A CN102589837A CN 102589837 A CN102589837 A CN 102589837A CN 2012100282776 A CN2012100282776 A CN 2012100282776A CN 201210028277 A CN201210028277 A CN 201210028277A CN 102589837 A CN102589837 A CN 102589837A
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Abstract
The invention provides a large fluid pressure wind tunnel, which comprises a wind tunnel chamber, wherein one end of the wind tunnel chamber is provided with a fan, the fan comprises a blade disc and blades, the blades are arranged at the periphery of the blade disc, each blade comprises an outer shell and an inner shell, fluid passages are formed between the inner shells and the outer shells of the blades, each inner shell is respectively provided with a guide inlet and a guide outlet along the length direction of each blade, and the guide inlets and the guide outlets are communicated with the fluid passages. The large fluid pressure wind tunnel has the beneficial effects that: no other power is added in the wind tunnel, the flow velocities of the fluid passages are speeded up through utilizing the centrifugal force to generate strong force from inside to outside, and the fluid pressure of the wind tunnel is greatly increased; and moreover, the flow velocities of the fluid passages of the fan are also accelerated through the strong suction force of a suction motor, so dozens of times of pressure difference is easily formed between the front part and the rear part of the fan, and larger fluid pressure is generated in the wind tunnel together with the discharged high-pressure fluid.
Description
Technical field
The present invention relates to a kind of fluid-flow analogy device, refer in particular to big hydrodynamic pressure wind-tunnel.
Background technology
Wind-tunnel is as a kind of simulation fluid motion device, normally be used for testing the different pressures state of various movable bodies in fluid, so wind tunnel test is a kind of requisite simulation test means for the exercise performance of test telecontrol equipment.But existing wind-tunnel all is to produce hydrodynamic pressure through the strong suction wind of high-power fan; Yet the monomer fan is little through the pressure that suction-air draft produces; Be not enough to simulate the fluid situation under the high-speed case; Even adopted multistage fan, its common pressure that produces also is not enough to, the difficult fluid state that reaches high pressure.
Modern in addition wind-tunnel is that movable body is motionless, and fluid is moving, only to the test of movable body windward side.And that virtual condition is a fluid is motionless, and movable body is moving.Just like the object in the mirror, the just projection of object in mirror can not reflect real object fully.So obtain a result and reality has certain gap, very imperfection from wind-tunnel.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, provide a kind of more near time of day and can produce big hydrodynamic pressure wind-tunnel.
The objective of the invention is to realize like this: big hydrodynamic pressure wind-tunnel, it comprises the wind-tunnel chamber, wind-tunnel chamber one end is provided with fan; Fan comprises page or leaf dish and flabellum; Be provided with a plurality of flabellums around the page or leaf dish, said flabellum comprises shell and inner casing, and its improvements are: be formed with the fluid passage between the inner casing of said flabellum and shell; Said inner casing is provided with introducing port and export mouth along the flabellum length direction, and said introducing port, export mouth are connected with the fluid passage;
In the said structure, it also comprises air-breathing motor, air intake duct and fluid delivery line; Said fluid delivery line is arranged in the fluid passage of flabellum, and the fluid delivery line links to each other with air intake duct, the air-breathing motor of air intake duct downlink connection; Said export mouth is the through hole that is arranged on the flabellum inner casing, and its communication of fluid passage to flabellum inner casing is outside; Or said export mouth is the opening of fluid delivery line and fluid passage intersection, and it communicates with air-breathing motor through air intake duct;
In the said structure, the page or leaf dish of said fan is hollow, and the fluid passage communicates in the page or leaf dish of hollow and the flabellum, and said air-breathing motor coils through the page or leaf that air intake duct connects hollow;
In the said structure, said wind-tunnel is divided into skin, internal layer, between inside and outside layer, is formed with fluid layer at interval; Said wind-tunnel internal layer is provided with the introducing port that communicates with fluid layer, and the front portion of said wind-tunnel is in the introducing port outer, that internal layer is equipped with to communicate with fluid layer;
In the said structure, the internal layer of said wind-tunnel and anterior skin be provided with the control introducing port and open/control device of the amount of closing; Be provided with at least one jet-suction device of air in the said wind-tunnel;
In the said structure, said introducing port is circle, strip, bar shaped, rhombus, ellipse, taper shape, triangle, arc or olive shape; The center line of the opening shape of introducing port and fan sense of rotation opposing parallel on the said flabellum;
In the said structure, be provided with in the said fluid passage and be used to increase the flow-disturbing face of fluid through the path, said flow-disturbing face surface is the shape of concavo-convex alternate streamlined or a plurality of arc shootings;
In the said structure, cutting apart through dividing plate along its length in the said fluid passage has two-layer passage, and two-layer passage communicates through the fluid export mouth; Wherein one deck passage communicates with said fluid introducing port, and another layer passage communicates with said air-breathing motor;
In the said structure, said wind-tunnel chamber one end is provided with multistage fan, and said air-breathing motor connects each page dish hollow bulb of multistage fan successively through air intake duct;
In the said structure, be provided with the motion platform that up, down, left, right, before and after moves and/or vibrates in the said wind-tunnel.
Than common wind-tunnel, beneficial effect of the present invention is not in wind-tunnel, not increase other power, but the flabellum of its fan be designed to by shell and inner casing and between the structure formed of fluid passage; On inner casing, establish introducing port and export mouth, introducing port, export mouth communicate with the interior fluid passage of flabellum, thereby the great power that centrifugal force capable of using in the running produces from inside to outside makes flow velocity quickening in the fluid passage; Thereby make the very big pressure differential of formation between the fan inside and outside shell, further, through the powerful suction of air-breathing motor generation; Make the higher flow velocity of generation in the fluid passage; Form two floor heights speed fluid layer on the inner casing that communicates with it, and form bigger fluid pressure differential between the shell, discharge fluid in company with fan and get in the wind-tunnel together; Hydrodynamic pressure in the wind-tunnel is increased greatly; And having fan now only through suction and discharge, the hydrodynamic pressure that very difficult generation is so big is so the present invention produces bigger hydrodynamic pressure than existing fan.
Description of drawings
Fig. 1 is the embodiment of the invention one a fan master TV structure synoptic diagram;
Fig. 2 is Figure 1A-A sectional structure chart;
Fig. 3 is the embodiment of the invention two, three fan side-looking structural representation;
Fig. 4 is the embodiment of the invention four wind-tunnel master TV structure synoptic diagram;
Fig. 5 is the embodiment of the invention five, six wind-tunnel master TV structure synoptic diagram.
The 1-fan; The 101-flabellum; The 102-shell; The 103-inner casing; The 105-introducing port; The 106-export mouth; The 107-center line; 2-page or leaf dish; The 201-bearing; The air-breathing motor of 3-; The 301-air intake duct; The 302-gas outlet; 4-wind-tunnel chamber; 401-is outer; The 402-internal layer; The 403-fluid layer; 404,405-introducing port; The 406-control device; 407-internal layer introducing port; 408-negative pressure chamber; 409-negative pressure chamber export mouth; The 5-motion platform; The air-breathing air jet system of 501-; The 6-fluid passage; 601-arc baffle; 602-flow-disturbing face; 603-fluid export mouth; 604-upper strata passage; 605-lower floor passage; The 606-dividing plate; 607-fluid delivery line.
Embodiment
By specifying technology contents of the present invention, structural attitude, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
Embodiment one
Shown in Fig. 1-3: big hydrodynamic pressure wind-tunnel, the wind-tunnel chamber 4 that it comprises, wind-tunnel chamber 4 front ends are provided with fan 1; Fan 1 comprises page or leaf dish 2 and flabellum 101; Around page or leaf dish 2, be provided with a plurality of flabellums 101, said flabellum 101 comprises shell 102 and inner casing 103, forms not wide fluid passage 6 between the shell 102 of flabellum 101 and the inner casing 103; Fluid passage 6 is the clearance layer between the inside and outside shell; Fluid passage 6 is provided with the introducing port 105 that a plurality of balances are uniformly distributed with along the length direction of flabellum 101 on inner casing 103, export mouth 106 is located at the flabellum 101 blade tip rear portion at edge along its length, and introducing port, export mouth are connected with the fluid passage.As an embodiment; Above-mentioned introducing port can be: shapes such as circle, strip, bar shaped, rhombus, ellipse, taper shape, triangle, arc, olive shape; In the center line 107 of the opening shape of introducing port and the circular opposing parallel of fan sense of rotation, be convenient to import the fluid passage to fluid.Wherein except circle and the strip.
When fan 1 work, flabellum 101 high speed rotating produce very big centrifugal force; Fluid inwardly produces very big hydrodynamic pressure through out-of-date each introducing port 105 is produced around the flabellum housing in the past backward; Under pressure, the while under centrifugal action, imports in the fluid passage 6 fluid again smoothly; Centrifugal force the fluid at fan 1 center to around dish out at a high speed; With fluid passage 6 same directions, so the fluid in the fluid passage 6 under the effect of centrifugal force great power, is dished out at a high speed from export mouth 106 through arc baffle 601 in 6 from the fluid passage; Its direction is consistent with fan 1 discharge directions again; In inner casing 103 and fluid passage 6, form the fluid layer of two layers of high-speed motion that communicates with each other through introducing port, the fluid layer that is equal to the fan flow velocity with shell 102 forms very big fluid pressure differential, and the high-pressure fluid of discharging with fan produces in the bigger hydrodynamic pressure entering wind-tunnel chamber 4 simultaneously jointly.
Because the length of flabellum 101 is bigger about 5 times than its width usually; Fluid is bigger about 5 times than width through the path of fluid passage; So rate of flow of fluid is faster than Width flow velocity under centrifugal action; Make between shell 102 and the inner casing 103 of fan front and rear part and produce very big fluid pressure differential, in the past backward to applying very big hydrodynamic pressure in the wind-tunnel chamber 4, a large amount of high-pressure fluids of discharging with fan simultaneously are applied in the wind-tunnel jointly.The high-pressure fluid that hydrodynamic pressure that the fluid pressure differential generation is very high and fan are discharged forms bigger hydrodynamic pressure simultaneously jointly and is applied in the wind-tunnel, to satisfy the needs of wind-tunnel high fluid pressure.
This shows; Technical scheme of the present invention does not increase other power; And the great power of utilizing centrifugal force to produce from inside to outside makes flow velocity quickening in the fluid passage, the hydrodynamic pressure in the wind-tunnel is increased greatly, and existing fan is only through suction and discharge; The hydrodynamic pressure that very difficult generation is so big is so the present invention produces bigger hydrodynamic pressure than existing fan.
Another embodiment; With above different be: in fluid passage 6, be provided with and be used to increase the flow-disturbing face 602 of fluid through the path; Concrete, flow-disturbing face 602 surfaces are the shape of concavo-convex alternate streamlined or a plurality of arc shootings, thereby can make the path in the fluid passage of fluid process increase about 1/3 at least again; In other words: on the basis of the fluid path length of said fans, increase by 1/3 path again, promptly make the bigger hydrodynamic pressure of generation between the fan front and rear part again.
Embodiment two
Shown in Fig. 1-3, different with embodiment one is: establish in the fluid passage that fluid delivery line 607 communicates with fluid export mouth 603 (export mouth is that air intake duct is a fluid export mouth 603 with the opening of fluid passage intersection), fluid delivery line 607 communicates with air-breathing motor 3 through air intake duct 301 again here.Concrete structure is: be provided with air-breathing motor 3; Air-breathing motor 3 self is provided with gas outlet 302; The output of air-breathing motor 3 is through air intake duct 301; Connect the page or leaf dish 2 with hollow with bearing 201, the page or leaf dish of hollow 2 communicates with the fluid passage through fluid delivery line 607, the fluid export mouth of in the fluid passage, establishing 603.
When fan and air-breathing motor are worked simultaneously; Centrifugal force and the air-breathing motor 3 common strong suction that produce; Near each introducing port 105 fluid high-speeds are sucked in the fluid passage, form the high fluid layer of two laminar flows speed in inner casing 103 and fluid passage 6, because the length of fluid delivery line 607 is equal to the length in the fluid passage; So that the path of fluid passage inner fluid process has increased by one times again than the width of flabellum; 10 times of fluids that promptly on above-mentioned 5 times basis, increase are through the path, and path length, flow velocity are fast under centrifugal action, simultaneously again under the powerful suction of air-breathing motor; Be easy to and accelerate the flow velocity in the fluid passage greatly; So form bigger fluid pressure differential between the flabellum inside and outside shell, the high-pressure fluid acting in conjunction simultaneously of discharging with fan is in wind-tunnel chamber 4, to satisfy the demand of wind-tunnel high fluid pressure.
What deserves to be mentioned is that under the help of centrifugal force, air-breathing motor 3 is only accelerated on several flabellum inner casings and the flow velocity in the not wide fluid passage; Just can increase bigger fluid pressure differential, as through to the control of air-breathing motor rotary speed, make in the fluid passage fast 15 times of the flow velocity on the velocity ratio shell; Just increase by 15 times fluid pressure differential; As fast 20 times, just increase by 20 times fluid pressure differential, in addition higher.Obviously; Be easy to realize through the control to air-breathing motor, and existing wind-tunnel will increase so high hydrodynamic pressure, multistage fan is arranged and also is good at realizing; And the present invention only accelerates not wide some rate of flow of fluids of several flabellum fluid passage of fan with very low power air-breathing motor; And not wide fluid passage is actually the clearance layer between the housing of flabellum front and rear part, and under the powerful suction of air-breathing motor, flow velocity is exceedingly fast in the not wide clearance layer; Make to form very big pressure differential between the flabellum front and rear part, just can realize the needs of wind-tunnel high fluid pressure.
A good wind-tunnel, what at first will reach is exactly high fluid pressure, and like the aircraft of several times of modern supersonic, in-flight hydrodynamic pressure is just very big.And the present invention is easy to satisfy the various needs of high fluid pressure in the wind-tunnel.
Embodiment three
Shown in Fig. 1-3, be not both with embodiment two: remove fluid delivery line 607, be divided into upper and lower two-layer passage to the fluid passage respectively with dividing plate 606, upper strata passage 604, lower floor's passage 605 communicate through fluid export mouth 603.
When fan and air-breathing motor are worked simultaneously, fan produces very big centrifugal force, simultaneously again under air-breathing motor 3 powerful suctions; The introducing port 105 that balance is uniformly distributed with on each flabellum sucks upper strata passage 604 passages near fluid high-speed on the inner casing of rear portion, sucks lower floor's 605 passages at a high speed through fluid export mouth 603, makes the common fast flowing fluid layer of three floor heights that forms in rear portion housing and the fluid passage; Because dividing plate 606 has increased path, one times of fluid passage, act on down the three-layer fluid very high speed simultaneously at air-breathing motor and centrifugal force; The fluid of growing any in the passage is through the path, in the powerful suction force state of air-breathing motor, to flow effect and little; But flow velocity is accelerated greatly, formed very big pressure differential, the high pressure that anterior low flow velocity produces with front shell; The low-pressure that produces to the rear portion high flow rate shifts; Fan is discharged the high pressure fluid simultaneously simultaneously, forms to the hydrodynamic pressure in the wind-tunnel, to satisfy the needs of wind-tunnel chamber 4 inner high voltage power jointly.
Upper and lower layer passage in the fluid passage is not limited to be provided with up and down here, also can about the diagonal line setting is set.
In sum, now wind-tunnel produces hydrodynamic pressure and produces through air-breathing exhaust, and air-breathing exhaust can not the very big hydrodynamic pressure of generation, so wind-tunnel also just is difficult to the requirement that reaches required.And fan of the present invention not only can produce suction and discharge; The more important the present invention of being also has flabellum pros and cons generation immense pressure difference to produce bigger hydrodynamic pressure; Several flabellums one sides are accelerated with air-breathing motor in the source of this very big pressure, expend slight power; Just reach the hydrodynamic pressure of demands of different, solve the problem that is difficult to increase around wind-tunnel hydrodynamic pressure for many years.The structure of this flabellum not only is applicable to fan, also is applicable to all propulsion system that produce hydrodynamic pressure with fan and turbine, and its efficient is improved, and energy consumption reduces simultaneously.
Embodiment four
Shown in Fig. 3-4: be not both with embodiment three; In wind-tunnel chamber 4, establish multistage fan 1; Air-breathing motor 3 passes through the hollow of multistage fan 1 respectively through air intake duct 301 page or leaf dish 2 communicates; Communicate through the introducing port 105 of inner casing 103 and the page or leaf dish 2 of fluid passage 6 interior double layer channels and hollow, make between each fan inside and outside shell and produce pressure differential, make multistage fan 1 produce bigger hydrodynamic pressure to wind-tunnel chamber 4 step by step.
When multistage fan 1 is worked with air-breathing motor 3, fan quick rotation at different levels, this moment, air-breathing motor 3 produced extremely strong suction; Page or leaf dish 2 through the hollow in air intake duct 301 and pairing each fan and the fluid passage 6 in each flabellum communicate with a plurality of introducing ports 105 on each inner casing, under powerful centrifugal force and extremely strong suction acting in conjunction; Make the inner casing 103 and fluid passage 6 of each flabellum; Interior two layers upper strata passage 604, lower floor's passage 605 form the high fluid layer of inside and outside three laminar flows speed, and its flow velocity is far faster than being equal to the flow velocity that fan produces on each fan drum; Make between the fan inside and outside shells at different levels and form pressure differential; The very big hydrodynamic pressure that produces is in the past backward to wind-tunnel chamber 4, and the bigger hydrodynamic pressure of common generation is to satisfy bigger hydrodynamic pressure needs.
Owing to establish a plurality of introducing ports 105 on each flabellum inside and outside shell; Its quantity and shape all directly have influence on flow rate of fluid and flow on the case surface; Make fans at different levels produce different pressure differentials on demand and form different fluids pressure, make the multistage fan can be step by step jointly to forming bigger hydrodynamic pressure in the wind-tunnel chamber 4.But follow high pressure to the rule that low-pressure shifts, just can make wind-tunnel produce more high fluid pressure.
According to the hydrodynamic pressure of wind-tunnel needs, select one or more levels fan that is suitable for.
Establish introducing port and fluid passage on the inner casing like afterbody in multistage fan; Under air-breathing motor and the powerful suction of centrifugal force; Make and produce very big pressure differential between the inside and outside shell, multistage fan low flow velocity in front produces hyperbar and forms bigger pressure differential with it again jointly simultaneously.Form bigger pressure differential transition range in the past backward, completely point in the wind-tunnel of rear portion, discharge under a large amount of high-pressure fluid actings in conjunction at fans at different levels again simultaneously, make and produce bigger hydrodynamic pressure in the wind-tunnel.
Embodiment five
As shown in Figure 5: be not both with embodiment four, wind-tunnel chamber 4 is divided into skin 401 and internal layer 402, is fluid layer 403 between ectonexine; On the internal layer 402 at wind-tunnel rear portion; Be evenly equipped with introducing port 404, be provided with negative pressure chamber 408, also be uniformly distributed with negative pressure chamber's export mouth 409 on the internal layer between negative pressure chamber 408 and the fan and communicate with the fan suction inlet in the fan front portion; In negative pressure chamber 408 front portions internal layer introducing port 407 is arranged; Forwardly skin is provided with introducing port 405, has control to open or close and what control device 406 of air inlet on this introducing port 405, and each introducing port 404 at internal layer 402 wind-tunnel rear portions also has control device 406.
When multistage fan 1 and air-breathing motor 3 were worked simultaneously, multistage fan rotated, at the extremely strong suction of the anterior generation of multistage fan; Through fluid layer 403, make the introducing port 404 that is uniformly distributed with on the wind-tunnel rear portion internal layer 402 suck fluid layer 403 to the fluid high-speed in the wind-tunnel, also suck the extraneous fluid of introducing port 405 parts of front portion simultaneously; Arrive negative pressure chamber 408 through internal layer introducing port 407; Supply with multistage fan to the high fluid of movement velocity through negative pressure chamber's export mouth 409 again, fans at different levels make between each fan pros and cons the generation enormous pressure poor because air-breathing motor 3 sucks the fluid high-speed of inner casing 103 introducing ports 105 in the fluid passage 6; Thereby make wind-tunnel chamber 4 form high fluid pressure step by step; Because each introducing port 404 at wind-tunnel rear portion has control device 406, may command fluid derived quantity, thereby the negative pressure value in the control wind-tunnel.At this moment, the wind-tunnel rear portion is formed with high negative pressure, and the front portion is again high zone of positive pressure; The higher-pressure region must be poor to the low-pressure area shift pressure, and particularly the wind-tunnel rear portion is again the high negative pressure district, and the front and rear part forms bigger pressure differential in the wind-tunnel; Each flabellum pros and cons produces very big fluid pressure differential simultaneously; Produce very big fluid pressure differential again between the front and rear part in the wind-tunnel, make jointly to form higher hydrodynamic pressure in the wind-tunnel again, produce the more needs of high fluid pressure to adapt to wind-tunnel; And big hydrodynamic pressure like this is difficult to form with existing traditional fan.The anterior introducing port 405 of wind-tunnel is also controlled air inflow with control device 406 open and closes or certain air inflow, to cooperate the inspiratory capacity of fan 1, makes malleation or the negative pressure state that can simulate varying environment in the wind-tunnel chamber 4.
All kinds of movable bodies of in wind-tunnel, testing; All be to do each item test through the simulating reality condition, have low pressure, negative pressure in vain at height in the actual environment, there is malleation windward side, the place ahead at the volley simultaneously; There is lateral fluid pressure the side; There is negative pressuren zone at the rear portion, just can simulate this state in the present embodiment, and present wind-tunnel is the forward hydrodynamic pressure that the simulation windward side produces.
Introducing port is inhaled into fluid layer 403 back formation negative pressure because the fluid in the wind-tunnel is from the rear portion; The volume size of stopping according to motion to be tested and the negative pressuren zone of the much areas in control rear portion be through what of control device 406 control negative pressure areas and suction air volume, thereby control the variation of negative pressure.What of control device 406 control intakes anterior introducing port 405 pass through; Comprehensively form the size of anterior fluid positive pressure in the wind-tunnel and the size of rear portion negative pressure thereby cooperate control to suck fluid, and produce the pressure extent in the wind-tunnel from fluid layer 403.
The discharge because the segment fluid flow in the multistage fan suction wind-tunnel circulates again; The initial fluid flow velocity and the pressure that suck when fan are original just big again; So it is just very big to form hydrodynamic pressure in the wind-tunnel; Through the introducing port 405,404 of front and rear portions and the cooperation of control device 406, the control of fluid pressure is just easier.
Also can establish introducing port 404 in part around the wind-tunnel internal layer 402, through control device 406, as required around movable body to be tested, a side or the local negative pressure state that forms certain limit, to satisfy the needs of different conditions.
Present embodiment fan front and rear part step by step produces very big hydrodynamic pressure through pressure differential, and along with fan discharge high-pressure fluid gets in the wind-tunnel together, positive negative pressuren zone also produced very big fluid pressure differential before and after the while wind-tunnel was interior, and the interior hydrodynamic pressure of wind-tunnel is increased greatly.
Embodiment six
As shown in Figure 5: as not to be both in wind-tunnel chamber 4 with embodiment five; But also be provided with the motion platform 5 that upper and lower, left and right are moved and/or vibrated,, motion platform 5 upper and lower, left and right or forward and backward moved with friction speed through control; Or the vibration of different frequency; On motion platform 5, also have air-breathing air jet system 501 (these are very conventional mechanical realizations), thereby can further strengthen the test in the wind-tunnel chamber, come the different conditions in the actual environment.
When multistage fan 1 is worked with air-breathing motor 3; In wind-tunnel chamber 4, produce very high fluid pressure; Be fixed on through movable body to be tested and on the windward side, receive hydrodynamic pressure on the motion platform, motion platform 5 is by the required speed of control simultaneously, in all around, move up and down or vibrate; Skimulated motion body more true to nature receives in real fluid motion jolts, the different conditions such as malleation, low pressure and negative pressure interference at vibration, air-flow and different directions and position.
Because the maximum problem of existing wind-tunnel is to produce hydrodynamic pressure with fan, to the windward side test of movable body; And fluid is static relatively in the reality, and the movement velocity of movable body how much, and how many moments compresses to fluid; This is only time of day, and wind-tunnel is then opposite, and movable body is motionless; The fluid that fan produces is moving, and this result who tests out is imperfection very, has a long way to go with reality; Why press this amended movable body again, in actual motion, all more or less many problems can occur through wind tunnel test, or even very serious problem; So in the motion state of motion platform 5, though can not compare with the real motion state of movable body, be at least than existing wind-tunnel more near one the step hydrodynamic pressure time of day; Motion platform fixedly movable body relative motion more can simulate reality comparatively real state in fluid, and is complete static good more than motion at least, because movable body is in stationary state; Fan produces the force value of windward side to different parts each position of stationary state test in wind-tunnel of movable body; On motion platform 5, in the relative motion after fixing, originally test each position in motion platform 5 relatively moves with movable body, the pressure at each position reached many variations that near the force value at position can occur originally; This variation be exactly stationary state possibly ignore with test less than the position, but in the reality maybe or certain variation that occurs.Here it is now after wind tunnel test is revised, the continuous reason of problem again in reality, and relative motion through motion platform and fan pros and cons produce bigger hydrodynamic pressure and combine, and obtain movable body more near the result of real fluid state.
Simultaneously; Around motion platform 5 correspondences and wind-tunnel; Being provided with at least one fixes or movably produces air-breathing air jet system 501 through control; Can open or close air-breathing air jet system 501 as required and come skimulated motion body bottom, top and the different malleations of both sides or the different fluid situation of negative pressure, cooperate the negative pressure value of introducing port 404 generations at wind-tunnel rear portion, and the anterior fan of wind-tunnel produces the hydrodynamic pressure of windward side.Also have motion platform to produce the vibration of top to bottom, left and right, front and rear relative motion and different frequency; Take all factors into consideration above each factor; Be used according to the different fluid state; Though can not simulate real motion state, pass through fan only in the movable body stationary state than present wind-tunnel at least, the windward side test that produces the forward hydrodynamic pressure is far better.
Wind-tunnel is in the movable body stationary state, and a plurality of positions of the windward side hydrodynamic pressure that produces through fan are tested, and movable body is when high-speed motion; Air is static relatively, the movable body movement velocity what, with regard to moment air compression what; Both are antipodal motion states, so wind-tunnel can only be tested general data, because can not in wind-tunnel, test out the fluid motion that is all produced by the movable body motion; Can only be that movable body is motionless, so fluid motion be the general motion state of skimulated motion body in fluid of wind-tunnel; The true to nature state of complete real simulated movable body in fluid because have no idea, and be state at the volley, have to have to take the second best; Through the relative motion of motion platform, can produce the variation that air-breathing air jet system forms partial fluid pressure, and the positive negative pressure state that forms in the wind-tunnel; The high fluid pressure that cooperates fan pros and cons of the present invention to produce again; Comprehensively be used, make wind-tunnel can simulate the more better real motion state in fluid of the movable body of sening as an envoy to, obtain better result.
Another embodiment is changed to screw propeller with the above fan of keeping watch that is not both, and presses said structure, also can well test the movable body in the water surface and the water.
In sum, the advantage that compares of the present invention and prior art is:
Because the length of flabellum is bigger about 5 times than its width usually; Fluid is bigger about 5 times than width through the path of fluid passage; Rate of flow of fluid is faster than width under powerful centrifugal action; Make between shell and the inner casing of fan front and rear part and produce bigger fluid pressure differential, a large amount of high-pressure fluids of discharging with fan simultaneously are applied in the wind-tunnel jointly.The high-pressure fluid that hydrodynamic pressure that fluid pressure differential produces and fan are discharged forms bigger hydrodynamic pressure simultaneously jointly and is applied in the wind-tunnel, to satisfy the needs of wind-tunnel high fluid pressure.
1, wind-tunnel all produces high fluid pressure through high-power fan at present; But fan is difficult to produce high pressure through air-breathing exhaust; Suck step by step through multistage fan exactly and compress; The pressure that is produced is also undesirable, and energy consumption is very big, the fluid different conditions of simulating also not ideal to the hydrodynamic pressure of movable body.
The present invention proposes first, between the shell of electric fan and inner casing, is the fluid passage, on inner casing, establishes a plurality of introducing ports and communicates with fluid passage in it; Produce extremely strong suction through air-breathing motor, make on the flabellum inner casing with the fluid passage inside and outside two layers of fluid layer that forms high flow rates, its flow velocity is the several times that fan produces flow velocity; Even higher, this state is easy to accomplish, only needs air-breathing motor control just passable; Form very big pressure differential at the fan pros and cons thus, the low pressure zone shift pressure that the high pressure that the shell of low flow velocity produces must produce to the inner casing of high flow rate, just as The natural flow of water always proceeds from a higher level to a lower one move; All be the natural law, so the pressure differential that the fan pros and cons produces is big more, the hydrodynamic pressure of generation is just big more; As in the fluid passage and the inner casing that communicates the with it flow velocity faster 10 times than case surface; Just produce the hydrodynamic pressure bigger 10 times, like big 20 times flow velocity, with regard to big 20 times hydrodynamic pressure than existing fan; Even higher, and this result only just can accomplish air-breathing motor control.So the present invention produces so big hydrodynamic pressure; Only through air-breathing motor fan simultaneously being accelerated flow velocity gets final product; Rather than existing fan can only produce hydrodynamic pressure through the air-breathing exhaust of powerful fan; So the present invention is energy-conservation more a lot of than existing fan, produced simultaneously hydrodynamic pressure is bigger, to satisfy the different fluid pressure state in wind-tunnel.Existing wind tunnel fan is to produce pressure through suction and discharge, and not still suction and discharge of the present invention also produce very big pressure differential simultaneously, so the present invention can produce bigger hydrodynamic pressure than existing wind-tunnel.
2, because of the maximum problem of existing wind-tunnel be, produce hydrodynamic pressure with fan, to the windward side test of movable body, and fluid is static relatively in the reality; The movement velocity of movable body how much, and how many moments compresses to fluid, and this is only time of day; Wind-tunnel is then opposite, and movable body is motionless, and the fluid that fan produces is moving; This result who tests out is imperfection very, has a long way to go with reality, why presses this amended movable body again through wind tunnel test; In actual motion all more or less many problems can appear, or even very serious problem, so motion platform of the present invention is in relative motion state; Though can not compare with the real motion state of movable body, the time of day of approximate at least hydrodynamic pressure, movable body is relative motion in motion platform; More can simulate the comparatively real state of movable body motion, complete static good more than movable body at least, because movable body is in stationary state; The force value at the position of testing in wind-tunnel, movable body is fixed in the relative motion on the motion platform, and originally position that stationary state is tested is in motion platform relatively moves; With the force value at original position and near force value difference can appear, this variation difference be exactly in the stationary state test less than with possibly ignore, but in the just certain variation that occurs of actual state.Here it is through the amended movable body of wind tunnel test, the continuous reason of problem in reality.Relative motion through motion platform and fan produce bigger hydrodynamic pressure and combine, and obtain movable body more near the result of real fluid state.
3, the present invention can also be formed with high negative pressure in the rear portion in wind-tunnel; The front portion is again high zone of positive pressure, and the higher-pressure region must be poor to the low-pressure area shift pressure, makes the wind-tunnel front and rear part form bigger pressure differential; In wind-tunnel, form higher hydrodynamic pressure; Satisfying the more needs of high fluid pressure of wind-tunnel, and in wind-tunnel, form so big hydrodynamic pressure, existing traditional fan is difficult to form.
4, all kinds of movable bodies of in wind-tunnel, testing all are to do each item test through the simulating reality condition, have low pressure, negative pressure in vain at height in the actual environment; There is malleation windward side, the place ahead at the volley simultaneously; Both sides are lateral pressure, and the rear portion is a negative pressure, again the relative motion through motion platform; These states of the simulation that just can be similar to, and present wind-tunnel only is that the simulation windward side is to forward hydrodynamic pressure that movable body produced.
5, the present invention forms bigger hydrodynamic pressure between the fan front and rear part, is changed to screw propeller and can in water, produces bigger hydrodynamic pressure equally by this structure, produces big hydrodynamic pressure wind-tunnel in the sky G&W so the present invention is applicable to.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. big hydrodynamic pressure wind-tunnel, it comprises the wind-tunnel chamber, wind-tunnel chamber one end is provided with fan; Fan comprises page or leaf dish and flabellum; Be provided with a plurality of flabellums around the page or leaf dish, said flabellum comprises shell and inner casing, it is characterized in that: be formed with the fluid passage between the inner casing of said flabellum and shell; Said inner casing is provided with introducing port and export mouth along the flabellum length direction, and said introducing port, export mouth are connected with the fluid passage.
2. big hydrodynamic pressure wind-tunnel as claimed in claim 1 is characterized in that: it also comprises air-breathing motor, air intake duct and fluid delivery line; Said fluid delivery line is arranged in the fluid passage of flabellum, and the fluid delivery line links to each other with air intake duct, the air-breathing motor of air intake duct downlink connection;
Said export mouth is the through hole that is arranged on the flabellum inner casing, and its communication of fluid passage to flabellum inner casing is outside; Or said export mouth is the opening of fluid delivery line and fluid passage intersection, and it communicates with air-breathing motor through air intake duct.
3. big hydrodynamic pressure wind-tunnel as claimed in claim 2 is characterized in that: the page or leaf dish of said fan is hollow, and the fluid passage communicates in the page or leaf dish of hollow and the flabellum, and said air-breathing motor coils through the page or leaf that air intake duct connects hollow.
4. big hydrodynamic pressure wind-tunnel as claimed in claim 1, it is characterized in that: said wind-tunnel is divided into skin, internal layer, between inside and outside layer, is formed with fluid layer at interval; Said wind-tunnel internal layer is provided with the introducing port that communicates with fluid layer, and the front portion of said wind-tunnel is in the introducing port outer, that internal layer is equipped with to communicate with fluid layer.
5. big hydrodynamic pressure wind-tunnel as claimed in claim 4 is characterized in that: the internal layer of said wind-tunnel and anterior skin be provided with the control introducing port and open/and the control device of the amount of closing; Be provided with at least one jet-suction device of air in the said wind-tunnel.
6. like any described big hydrodynamic pressure wind-tunnel of claim 1-5, it is characterized in that: said introducing port is circle, strip, bar shaped, rhombus, ellipse, taper shape, triangle, arc or olive shape; The center line of the opening shape of introducing port and fan sense of rotation opposing parallel on the said flabellum.
7. like any described big hydrodynamic pressure wind-tunnel of claim 1-5, it is characterized in that: be provided with in the said fluid passage and be used to increase the flow-disturbing face of fluid through the path, said flow-disturbing face surface is the shape of concavo-convex alternate streamlined or a plurality of arc shootings.
8. like any described big hydrodynamic pressure wind-tunnel of claim 1-5, it is characterized in that: cutting apart through dividing plate along its length in the said fluid passage has two-layer passage, and two-layer passage communicates through the fluid export mouth; Wherein one deck passage communicates with said fluid introducing port, and another layer passage communicates with said air-breathing motor.
9. like any described big hydrodynamic pressure wind-tunnel of claim 1-5, it is characterized in that: said wind-tunnel chamber one end is provided with multistage fan, and said air-breathing motor connects each page dish hollow bulb of multistage fan successively through air intake duct.
10. like any described big hydrodynamic pressure wind-tunnel of claim 1-5, it is characterized in that: be provided with the motion platform that up, down, left, right, before and after moves and/or vibrates in the said wind-tunnel.
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| CN102589837B (en) | 2016-05-18 |
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