CN202660965U - Vortex generator for improving and intensifying heat transfer effects by punching jet flow - Google Patents
Vortex generator for improving and intensifying heat transfer effects by punching jet flow Download PDFInfo
- Publication number
- CN202660965U CN202660965U CN 201220202053 CN201220202053U CN202660965U CN 202660965 U CN202660965 U CN 202660965U CN 201220202053 CN201220202053 CN 201220202053 CN 201220202053 U CN201220202053 U CN 201220202053U CN 202660965 U CN202660965 U CN 202660965U
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- China
- Prior art keywords
- eddy generator
- punching
- vortex generator
- flow
- heat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
Abstract
The utility model belongs to the technical field of heat transfer intensification, and discloses a vortex generator for improving and intensifying heat transfer effects by punching jet flow. Holes are opened at appropriate positions on a windward side of an airfoil-shaped or column-shaped vortex generator, so that fluids in front of the windward side of the vortex generator at higher flow speeds relative to the fluid flow speeds of a leeside penetrate through the holes to scour flow dead areas or heat-transfer poor areas of the leeside of the vortex generator, and the average flow speed and the kinetic energy of the areas are improved, the heat-transfer poor areas are eliminated, and effects of the vortex generator on intensification of heat-transfer and flow resistance reduction effects and the efficiency of a heat exchanger are further improved; and simultaneously, the windward area and flow separation area ranges are decreased due to punched holes, the vortex generator shape resistance is reduced, and further, flow losses are decreased. The vortex generator has the advantages of being convenient to machine, simple to manufacture and apparent in effect and has wide application prospects and promotional values in the heat-transfer intensification of gas-liquid or gas-gas heat exchangers.
Description
Technical field
The utility model belongs to the enhanced heat exchange technical field, particularly a kind of eddy generator that utilizes the punching jet to improve the enhanced heat exchange effect.Appropriate location punching on the eddy generator windward side specifically, guiding eddy generator windward side fluid passes hole, wash away the stagnation region (flow dead of eddy generator lee face, simultaneously also be the weak district of conducting heat), improve this district's mean flow rate and kinetic energy, the weak district of eliminate conducting heat, further improve eddy generator enhanced heat exchange effect and and the usefulness of Drag Reduction, thereby reduced flow losses.
Background technology
Utilize eddy generator (Vortex Generator, hereinafter to be referred as VG) to induce the vortex enhanced heat exchange be that a kind of passive, autotelic dependence produces the method that Secondary Flow comes attenuate or destroys boundary layer or laminar sublayer augmentation of heat transfer, receiving increasing concern aspect solution-air or the heat exchange of gas-gas (vapour) heat-exchange apparatus gas side because it is economical and practical strengthening.Because the good effect of longitudinal shrinking turbulence aspect augmentation of heat transfer, long direction eddy generator become the focus of people's research.Mainly take aerofoil profile, column type long direction eddy generator as main.Aerofoil profile eddy generator such as dalta wing, RECTANGULAR WINGS, tapered airfoil, the cylinder wing produce stronger longitudinal shrinking turbulence in the end; Column type eddy generator (such as square column, cylinder, cylindroid) also produces stronger water chestnut vortex system at root, and then the heat convection of reinforcement and wall.No matter be aerofoil profile or column type eddy generator, because the barrier effect of its convection cell, in augmentation of heat transfer, also increased flow resistance, and there is a bit of low speed flow region in its tail (afterwards) section owing to flow separation, claim again stagnation region or flow dead, this district is because flow velocity is lower, and heat transfer effect is poor, belong to the weak district of conducting heat, thereby to utilizing eddy generator enhanced heat exchange effect that negative effect is arranged.The method that jet is introduced in the appropriate location punching on the eddy generator windward side that the utility model proposes has solved this problem, has effectively eliminated the rear dead band of the wing (post), for improving eddy generator augmentation of heat transfer effect positive effect is arranged; Because punching has reduced eddy generator front face area and flow separation zone scope, reduce the eddy generator form drag, thereby reduced flow losses, for raising heat exchanger effectiveness, energy-saving material-saving important meaning is arranged.
The utility model content
The purpose of this utility model is for eddy generator in the prior art, because the barrier effect of its convection cell, in augmentation of heat transfer, also increased flow resistance, and there is a bit of low speed flow region in its tail (afterwards) section owing to flow separation, claim again stagnation region or flow dead, this district is because flow velocity is lower, heat transfer effect is poor, belong to the weak district of conducting heat, thereby to utilizing eddy generator enhanced heat exchange effect that the deficiency of negative effect is arranged, and a kind of eddy generator that utilizes the punching jet to improve the enhanced heat exchange effect is provided, it is characterized in that, in the appropriate location punching of eddy generator windward side, high flow velocities fluid with respect to lee face before the guiding eddy generator windward side passes hole, washes away the mobile stagnation region of eddy generator lee face, improves this district's mean flow rate and kinetic energy, eliminate the weak district of conducting heat, and then improve eddy generator enhanced heat exchange and Drag Reduction effect and heat exchanger effectiveness.
The shape of described punching is not limited to circular hole, so that be processed as suitable; Its punching quantity is more than one, and the punching gross area is 0.1 to 0.5 times that the eddy generator fluoran stream surface amasss.
Described relevant with eddy generator form and mounting means in the appropriate location punching of eddy generator windward side, on short transverse, punching be centered close to slightly upper/lower positions of eddy generator height center line; In the horizontal direction, according to eddy generator form and mounting means and decide, for 45
oThe RECTANGULAR WINGS that the angle of attack is arranged, the hole center is in eddy generator horizontal center position.
Described eddy generator form is a kind of in dalta wing, RECTANGULAR WINGS, tapered airfoil, the cylinder wing, square column, cylinder or the cylindroid.
The beneficial effects of the utility model are because in the appropriate location punching of eddy generator windward side, so that eddy generator windward side high flow velocities fluid passes the hole of washing open, wash away the flow dead of eddy generator lee face and improve this district's mean flow rate and kinetic energy, effectively improved the heat transfer effect of this district's fluid and wall; In the longitudinal whorl strengthened heat transfer of aerofoil profile and the generation of column type eddy generator, eliminated because the adverse effect that eddy generator produces the weak district of localized heat transfer is set, further improve eddy generator enhanced heat exchange effect and heat exchanger effectiveness; Because punching has reduced eddy generator front face area and flow separation zone scope, reduced the eddy generator form drag, thereby reduced flow losses simultaneously.The method is applicable to utilize vortex generator augmentation of heat transfer field, have easy to process, make characteristics simple, successful.
Description of drawings
Fig. 1 is several eddy generator punching profiles and structural representation.
Fig. 2 is the jet strengthened heat exchange schematic diagram of tapered airfoil eddy generator punching.
The specific embodiment
The utility model provides a kind of processing and manufacturing to utilize simply and easily the punching jet to improve the eddy generator of enhanced heat exchange effect.Below in conjunction with accompanying drawing the utility model is further described.
Eddy generator as shown in Figure 1 is a dalta wing, b tapered airfoil, c RECTANGULAR WINGS, d square body and e cylinder tapered airfoil; But be not limited to this several structures; Eddy generator length, height, gauge or ratio require according to heat exchanger form and channel size respective design and decide; Its material can adopt but be not limited to easily cutting of the material of heat exchanger own or other, the crooked material (comprising metal) of installing.Its material heatproof and other character should satisfy the requirement that heat exchanger allows condition of work; The suitable size hole 2 of appropriate location upper punch folding on the windward side 1 of Fig. 1, eddy generator shown in Figure 2, so that the high flow velocities fluid with respect to lee face 3 passes hole 2 before the eddy generator windward side 1, wash away the flow dead of eddy generator lee face 3, it simultaneously also is the weak district of conducting heat, improve this district's mean flow rate and kinetic energy, eliminate the weak district of conducting heat, further improve eddy generator enhanced heat exchange effect and heat exchanger effectiveness; Punching has reduced eddy generator front face area and flow separation zone scope, has reduced the eddy generator form drag, thereby reduces flow losses;
Described eddy generator hole can but be not limited to adopt punching press, boring method, but should penetrate the eddy generator wall thickness, guarantee that eddy generator forward part fluid passes hole and washes away flow dead behind the eddy generator;
The described hole location of washing open is relevant with eddy generator form and mounting means, on short transverse, the hole center can be positioned at but be not limited to be positioned at slightly upper/lower positions of eddy generator height center line, is intended to fluid and passes the longitudinal Vortex generation interference effect that eddy generator end (top) section is not brought out when hole washes away dead band behind the wing (post); On the horizontal direction, can be according to eddy generator form and mounting means and decide, as for 45
oThe RECTANGULAR WINGS that the angle of attack is arranged, the hole center can be in eddy generator horizontal center position; For tapered airfoil or dalta wing, can slightly partially near its higher stile one side position (as shown in Figure 2), because the dead band is present in this position behind the wing, and there be stronger end longitudinal Vortex in low stile side, and the position in whirlpool is lower, can wash away near the wall fluid; Other eddy generator such as column type can be in the similar position punching;
Described eddy generator void shape can but be not limited to circular hole so that be processed as suitable; Its size is decided with flow regime according to the eddy generator fluoran stream surface is long-pending, and hole area can be 0.1 to 0.5 times of eddy generator area, but is not limited to this scope, and for the mobile lower operating mode of Reynolds number, desirable hole area is large value; It is opposite when Reynolds number is higher.The quantity of described eddy generator hole can be but be not limited to 1, hour several holes can be set such as single hole area, the quantity of a plurality of holes and arrange and be advisable with enhanced heat exchange and Drag Reduction best results.
Claims (4)
1. eddy generator that utilizes the punching jet to improve the enhanced heat exchange effect, it is characterized in that, in the appropriate location punching of eddy generator windward side, high flow velocities fluid with respect to lee face before the guiding eddy generator windward side passes hole, wash away the mobile stagnation region of eddy generator lee face, improve this district's mean flow rate and kinetic energy, eliminate the weak district of conducting heat, and then improve eddy generator enhanced heat exchange and Drag Reduction effect and heat exchanger effectiveness.
2. the described eddy generator that utilizes the punching jet to improve the enhanced heat exchange effect according to claim 1 is characterized in that the shape of described punching is not limited to circular hole, so that be processed as suitable; Its punching quantity is more than one, and the punching gross area is 0.1 to 0.5 times that the eddy generator fluoran stream surface amasss.
3. the described eddy generator that utilizes the punching jet to improve the enhanced heat exchange effect according to claim 1, it is characterized in that, described relevant with eddy generator form and mounting means in the appropriate location punching of eddy generator windward side, on short transverse, punching be centered close to slightly upper/lower positions of eddy generator height center line; In the horizontal direction, according to eddy generator form and mounting means and decide, for 45
oThe RECTANGULAR WINGS that the angle of attack is arranged, the hole center is in eddy generator horizontal center position.
4. the described eddy generator that utilizes the punching jet to improve the enhanced heat exchange effect according to claim 1 is characterized in that, described eddy generator form is a kind of in dalta wing, RECTANGULAR WINGS, tapered airfoil, the cylinder wing, square column, cylinder or the cylindroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220202053 CN202660965U (en) | 2012-05-07 | 2012-05-07 | Vortex generator for improving and intensifying heat transfer effects by punching jet flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220202053 CN202660965U (en) | 2012-05-07 | 2012-05-07 | Vortex generator for improving and intensifying heat transfer effects by punching jet flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202660965U true CN202660965U (en) | 2013-01-09 |
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ID=47455869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220202053 Expired - Fee Related CN202660965U (en) | 2012-05-07 | 2012-05-07 | Vortex generator for improving and intensifying heat transfer effects by punching jet flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202660965U (en) |
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2012
- 2012-05-07 CN CN 201220202053 patent/CN202660965U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20130507 |