CN112092927A - Vortex generator based on FSAE racing car - Google Patents
Vortex generator based on FSAE racing car Download PDFInfo
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- CN112092927A CN112092927A CN202011138030.0A CN202011138030A CN112092927A CN 112092927 A CN112092927 A CN 112092927A CN 202011138030 A CN202011138030 A CN 202011138030A CN 112092927 A CN112092927 A CN 112092927A
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- SAZUGELZHZOXHB-UHFFFAOYSA-N acecarbromal Chemical compound CCC(Br)(CC)C(=O)NC(=O)NC(C)=O SAZUGELZHZOXHB-UHFFFAOYSA-N 0.000 claims description 6
- 238000000926 separation method Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 9
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 241001676573 Minium Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 241000270281 Coluber constrictor Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- OQZCSNDVOWYALR-UHFFFAOYSA-N flurochloridone Chemical compound FC(F)(F)C1=CC=CC(N2C(C(Cl)C(CCl)C2)=O)=C1 OQZCSNDVOWYALR-UHFFFAOYSA-N 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D37/00—Stabilising vehicle bodies without controlling suspension arrangements
- B62D37/02—Stabilising vehicle bodies without controlling suspension arrangements by aerodynamic means
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Abstract
The invention provides a vortex generator based on an FSAE racing car, which comprises a vortex generator body, wherein the vortex generator body comprises a primary vortex generator and a secondary vortex generator, the primary vortex generator is of a pentahedron structure, the primary vortex generator comprises an upper wedge-shaped plane, the upper wedge-shaped plane comprises a front end straight line and two curved side edges connected with two end points of the front end straight line, free ends of the two curved side edges are arranged in an intersecting manner, a front windward surface is vertically arranged at the front end straight line of the upper wedge-shaped plane, curved side surfaces are vertically arranged at the two curved side edges of the upper wedge-shaped plane, the height of each curved side surface is gradually increased from the front windward surface to the back, and a lower wedge-shaped curved surface is arranged at the front windward surface and the curved side surfaces.
Description
Technical Field
The invention belongs to the technical field of hydromechanics, and particularly relates to a vortex generator based on an FSAE racing car.
Background
According to the current aerodynamic development situation of FSAE (formula SAE) racing cars, the current technology for delaying flow separation is to place a clapboard type vortex generator in the normal direction of an important aerodynamic surface and utilize the sharp edge of the clapboard type vortex generator to induce the generation of vortex so as to delay flow separation, but the existing vortex generator for racing cars cannot accurately induce vortex upstream of the stall point of a wing, so that the windward area and the resistance of the racing cars are increased.
Disclosure of Invention
The problem to be solved by the present invention is to provide a FSAE racing car based vortex generator that is small in volume and capable of inducing effective vortices upstream of the stall point of the wing.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a vortex generator based on FSAE cycle racing, includes the vortex generator body, the vortex generator body includes one-level vortex generator and second grade vortex generator, one-level vortex generator is pentahedron structure, one-level vortex generator includes wedge plane, go up wedge plane include the front end straight line and with two bent type sides of the sharp both ends point connection of front end, two the crossing setting of free end of bent type side, go up the planar front end straight line department of wedge and be provided with preceding windward side perpendicularly, it all is provided with bent type side perpendicularly to go up two bent type sides departments of wedge, the height of bent type side is located backward by preceding windward side and increases gradually, connects preceding windward side and bent type side are provided with down the wedge curved surface.
Further, the height H1 of the curved side face at the front windward side is 0.5mm, and the height H2 at the intersection of the two curved side edges is 5 mm.
Further, the length L1 of the front end straight line of the upper wedge-shaped plane is 20mm, and the length L2 of the straight line of the upper wedge-shaped plane is 40 mm.
Further, second grade vortex generator is fixed to be set up go up on the wedge plane, one-level vortex generator and second grade vortex generator are integrated into one piece structure.
Further, the secondary vortex generator is in a tear drop structure, the linear length L3 of the secondary vortex generator is 7.5mm, and the highest height H3 of the secondary vortex generator is 0.5 mm.
Compared with the prior art, the invention has the advantages and beneficial effects that:
1. the vortex generator body adopts a structure combining the primary vortex generator and the secondary vortex generator, the primary vortex generator adopts a double-edge and wedge-shaped structure, the front windward side and the tail part of the vortex generator both adopt sharp-edge structures, two vortices with opposite directions can be induced in the negative direction of the vehicle body coordinate system X, the induction efficiency is high, meanwhile, the secondary vortex generator can reduce the flow separation of air flow on the plane of the vortex generator, and the vortex generator body is favorable for improving the strength of the induced vortices.
2. The vortex generator body is small in size, namely the area of the vortex generator body projected to the y axis of a vehicle coordinate system is small, so that the increase of the windward area brought by the vortex generator body can be ignored, and the generation of resistance is effectively reduced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a vortex generator based on FSAE racing car.
Fig. 2 is a front view schematically showing the structure of fig. 1.
Fig. 3 is a schematic top view of the structure of fig. 1.
Fig. 4 is a left side view of the structure of fig. 1.
Fig. 5 is a schematic structural diagram of a vortex generator based on an FSAE racing car, which is mounted on the lower surface of a main wing of a front wing of the racing car.
Fig. 6 is a pressure contrast cloud plot of the lower surface of the FSAE racer front wing before and after installation of the vortex generator body.
Fig. 7 is a flow chart of the vortex generator body for the lower surface of the negative lift airfoil at the FSAE racing coordinate system Y of 0.5 m.
Fig. 8 is a speed cross-sectional comparison cloud plot for the effect of the front wing combination wing on front and rear blade flow separation control for mounting the vortex generator body at FSAE racing coordinate system Y of 0.5 m.
FIG. 9 is a 0-iso surface Q-criteria cloud plot of the range of influence of the vortex surface on the entire FSAE race car.
In the figure: 1-a primary vortex generator; 2-a secondary vortex generator; 3-upper wedge plane; 4-front windward side; 5-curved sides; 6-lower wedge-shaped curved surface; 301-front end straight line; 302-curved sides.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1-4, a vortex generator based on FSAE racing car comprises a vortex generator body, the vortex generator body comprises a first-stage vortex generator 1 and a second-stage vortex generator 2, the first-stage vortex generator 1 is of a pentahedron structure, the first-stage vortex generator 1 comprises an upper wedge-shaped plane 3, the upper wedge-shaped plane 3 comprises a front end straight line 301 and two curved side edges 302 connected with two end points of the front end straight line 301, the free ends of the two curved side edges 302 are intersected, a front windward surface 4 is vertically arranged at the front end straight line 301 of the upper wedge-shaped plane 3, curved side surfaces 5 are vertically arranged at the two curved side edges 302 of the upper wedge-shaped plane 3, the height of the curved side surfaces 5 is gradually increased from the front windward surface 4 to the rear, and a lower wedge-shaped curved surface 6 is arranged at the front windward surface 4 and the curved side surfaces 5, the curvature of the lower wedge-shaped curved surface 6 is determined by the airfoil curve of the lower surface of the negative lift wing of the front wing of the FSAE racing car, the structure of the vortex generator body adopts a structure of combining a first-stage vortex generator 1 and a second-stage vortex generator 2, the first-stage vortex generator 1 adopts a design of a double-edge and wedge-shaped structure, the front windward side 4 and the tail of the first-stage vortex generator 1 both adopt a sharp-edge structure, two vortices which are opposite to each other can be induced in the negative direction of a car body coordinate system X at the same time, the induction efficiency is high, meanwhile, the second-stage vortex generator 2 can reduce the flow separation of airflow on the plane of the vortex generator body, and the strength of the vortex induced by the.
Further, the height H1 of the curved side surface 5 at the front windward side 4 is 0.5mm, and the height H2 at the intersection of the two curved side edges 302 is 5 mm.
Further, the length L1 of the front end straight line 301 of the upper wedge-shaped plane 3 is 20mm, and the straight line length L2 of the upper wedge-shaped plane 3 is 40 mm.
The vortex generator body is small in size, namely the area of the vortex generator body projected to the y axis of a vehicle coordinate system is small, so that the increase of the windward area brought by the vortex generator body can be ignored, and the generation of resistance is effectively reduced.
Further, second grade vortex generator 2 is fixed to be set up go up on the wedge plane 3, one-level vortex generator 1 and second grade vortex generator 2 are integrated into one piece structure, make the wholeness of vortex generator body good, and the product precision is high, and the surface is smooth, effectively reduces the production of resistance.
Further, second grade vortex generator 2 is "tear drop" structure, second grade vortex generator 2's straight line length L3 is 7.5mm, second grade vortex generator 2's highest point height H3 is 0.5mm, the reducible air current of second grade vortex generator 2 of "tear drop" structure is at the planar flow separation of vortex generator body, and help promoting the intensity of the vortex that vortex generator body induced, partial air current can be under the induction of "tear drop" constructional device, generate the minium vortex, postpone the air current at the planar flow separation of one-level vortex generator 1 to under the biade and the wedge structure of one-level vortex generator 1, further induce the minium vortex.
Examples
The vortex generator is an aerodynamic accessory for local flow control, forms vortex at the edge and transmits the vortex to the downstream by utilizing the shape structure of the aerodynamic accessory, and increases the capability of flow resisting the adverse pressure gradient by promoting the kinetic energy exchange between a downstream boundary layer and the outside and forcing the inner layer and the outer layer of the near-wall surface to flow, thereby playing the role of delaying flow separation.
As shown in figure 5, the vortex generator bodies of the invention are arranged on the lower surface of the front wing main wing of the FSAE racing car in a transverse parallel equidistant arrangement mode, are longitudinally arranged at the position 25mm upstream of the stall point of the lower surface of the front wing, 6 vortex generators are arranged on the main wings at two sides, the interval between the tail edges of two adjacent vortex generator bodies is 50mm, and all the vortex generator bodies are adhered to the lower surface of the front wing of the racing car by glue.
Compared with the surface pressure of the front wing of the FSAE racing car with the vortex generator body arranged in front and back, as shown in FIG. 6, after the vortex generator body is arranged, the area of the maximum negative pressure area is increased, and the maximum negative pressure value is increased, so that the front wing has higher negative lift force and negative lift force coefficients, and after the vortex generator body is arranged, when airflow is transmitted from the maximum negative pressure position to the arrow direction, the negative pressure area of each section of pressure gradient is increased due to the effect of the vortex generator on enhancing the airflow anti-pressure gradient capacity, so that the negative lift force coefficient is increased, and the pneumatic efficiency is higher.
Specifically, the lift value of the front and rear negative lift coefficients of the vortex generator is monitored, the negative lift coefficient of the front wing when the vortex generator body is not installed is shown in the following table 1, and the negative lift coefficient of the front wing when the vortex generator body is installed is shown in the table 2, when two sets of simulation boundary conditions (the vehicle speed is 15m/s), the grid number and the like are basically equal, the gain of the negative lift coefficient of the front wing by the vortex generator body is about 0.0116, the vortex generator body works through the effect of the vortex generator body, so that the front wing works under the working condition with smaller flow separation trend, the negative lift coefficient of the front wing is increased from 0.8921 to 0.9886, the increased lift value is 0.0965, and the lift effect of the negative lift coefficient is obvious.
TABLE 1 negative lift coefficient of front wing without vortex generator body
TABLE 2 coefficient of negative lift of front wing when mounting vortex generator body
In addition, the significance of the vortex effect induced by the vortex generator body is monitored, as shown in fig. 7, the incoming wind flows through the sharp edge of the vortex generator and is converted into the vortex which moves regularly and can promote the exchange of the downstream boundary layer and the external kinetic energy, and the vortex effect is significant.
As shown in fig. 8, by comparing the influence areas of the front and rear flow separation areas of the installed vortex generator body, it can be obviously observed that the edge of the flow separation area is reduced and the influence area is smaller due to the effect of delaying the flow separation after the vortex generator body is installed, so that the influence on the downstream flow field of the racing car, such as the tail fin, the diffuser and the like, is smaller, the aerodynamic efficiency is higher, and the front and rear axle load distribution caused by the negative lift force of the racing car is more reasonable.
As shown in FIG. 9, the isosurface of the whole vehicle is created in the simulation software, the set value is 0, and the influence range of the vortex surface is observed by applying the Q-criterion, and the effect is obvious when the vortex is induced by the vortex generator body as shown in the figure.
Therefore, the vortex generator can accurately induce vortex generation at the upstream of the stall point of the wing, delays flow separation of important surfaces, improves the aerodynamic efficiency of the racing car, has an obvious vortex effect, and effectively reduces the windward area and the resistance of the racing car due to the structural design of the vortex generator body.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (5)
1. A FSAE racing car based vortex generator, characterized by: comprises a vortex generator body, the vortex generator body comprises a primary vortex generator (1) and a secondary vortex generator (2), the primary vortex generator (1) is of a pentahedron structure, the primary vortex generator (1) comprises an upper wedge-shaped plane (3), the upper wedge-shaped plane (3) comprises a front end straight line (301) and two curved side edges (302) connected with two end points of the front end straight line (301), the free ends of the two curved side edges (302) are arranged in an intersecting way, a front windward side (4) is vertically arranged at the front end straight line (301) of the upper wedge-shaped plane (3), the two curved side edges (302) of the upper wedge-shaped plane (3) are both vertically provided with curved side surfaces (5), the height of the curved side face (5) is gradually increased from the front windward side face (4) to the rear, and a lower wedge-shaped curved face (6) is arranged to connect the front windward side face (4) and the curved side face (5).
2. The FSAE racing car-based vortex generator of claim 1, wherein: the height H1 of the curved side face (5) at the front windward side (4) is 0.5mm, and the height H2 at the intersection of the two curved side edges (302) is 5 mm.
3. The FSAE racing car-based vortex generator of claim 1, wherein: the length L1 of a front end straight line (301) of the upper wedge-shaped plane (3) is 20mm, and the length L2 of the straight line of the upper wedge-shaped plane (3) is 40 mm.
4. The FSAE racing car-based vortex generator of claim 1, wherein: second grade vortex generator (2) fixed the setting go up on wedge plane (3), one-level vortex generator (1) and second grade vortex generator (2) are the integrated into one piece structure.
5. The FSAE racing car based vortex generator of claim 4, wherein: second grade vortex generator (2) are "tear drop" structure, second grade vortex generator (2) straight line length L3 is 7.5mm, second grade vortex generator (3) the highest height H3 is 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011138030.0A CN112092927A (en) | 2020-10-22 | 2020-10-22 | Vortex generator based on FSAE racing car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011138030.0A CN112092927A (en) | 2020-10-22 | 2020-10-22 | Vortex generator based on FSAE racing car |
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| Publication Number | Publication Date |
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| CN112092927A true CN112092927A (en) | 2020-12-18 |
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| CN202011138030.0A Pending CN112092927A (en) | 2020-10-22 | 2020-10-22 | Vortex generator based on FSAE racing car |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115788957A (en) * | 2022-11-29 | 2023-03-14 | 广东顺威精密塑料股份有限公司 | Volute with vortex generator and multi-wing centrifugal fan using volute |
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| US20110315248A1 (en) * | 2010-06-01 | 2011-12-29 | Simpson Roger L | Low drag asymmetric tetrahedral vortex generators |
| CN102865274A (en) * | 2011-07-09 | 2013-01-09 | 拉姆金动力系统有限责任公司 | Vortex generators |
| CN203796681U (en) * | 2013-12-31 | 2014-08-27 | 中国科学院工程热物理研究所 | Vortex generator structure for boundary layer separation under inhibitory shock wave effect |
| US20150329200A1 (en) * | 2012-12-31 | 2015-11-19 | University Of Kansas | Radar energy absorbing deformable low drag vortex generator |
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| US9488055B2 (en) * | 2012-06-08 | 2016-11-08 | General Electric Company | Turbine engine and aerodynamic element of turbine engine |
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| CN110450942A (en) * | 2019-06-27 | 2019-11-15 | 南京航空航天大学 | It is a kind of for fuselage drag reduction and delay air-flow separate vortex generator |
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-
2020
- 2020-10-22 CN CN202011138030.0A patent/CN112092927A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2800291A (en) * | 1950-10-24 | 1957-07-23 | Stephens Arthur Veryan | Solid boundary surface for contact with a relatively moving fluid medium |
| US20100288379A1 (en) * | 2009-03-30 | 2010-11-18 | Dahm Werner J A | Passive boundary layer control elements |
| US20110315248A1 (en) * | 2010-06-01 | 2011-12-29 | Simpson Roger L | Low drag asymmetric tetrahedral vortex generators |
| CN102865274A (en) * | 2011-07-09 | 2013-01-09 | 拉姆金动力系统有限责任公司 | Vortex generators |
| US9488055B2 (en) * | 2012-06-08 | 2016-11-08 | General Electric Company | Turbine engine and aerodynamic element of turbine engine |
| US20150329200A1 (en) * | 2012-12-31 | 2015-11-19 | University Of Kansas | Radar energy absorbing deformable low drag vortex generator |
| US20160016616A1 (en) * | 2013-03-13 | 2016-01-21 | Andrew Bacon | Improvements in the fuel efficiency of road vehicles |
| CN203796681U (en) * | 2013-12-31 | 2014-08-27 | 中国科学院工程热物理研究所 | Vortex generator structure for boundary layer separation under inhibitory shock wave effect |
| CN106585960A (en) * | 2015-10-15 | 2017-04-26 | 郭宏斌 | Eddy forming and drag reduction apparatus capable of being produced on the front portions of various aerocrafts |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115788957A (en) * | 2022-11-29 | 2023-03-14 | 广东顺威精密塑料股份有限公司 | Volute with vortex generator and multi-wing centrifugal fan using volute |
| CN115788957B (en) * | 2022-11-29 | 2023-05-30 | 广东顺威精密塑料股份有限公司 | Volute with vortex generator and multi-wing centrifugal fan using same |
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