Formula car diffuser

Abstract

The utility model discloses a formula car diffuser which is detachably installed at the bottom of an FSAE racing car and comprises a bottom plate and side expansions symmetrically distributed on the two sides of the bottom plate and further comprises rear wheel wind blocking blocks, the side walls of the rear wheel wind blocking blocks are tightly attached to the outer sides of the side expansions, and the bottoms of the rear wheel wind blocking blocks are detachably fixed to the portions, outside the side expansions, of the bottom plate. The rear wheel windshield block is of a triangular wedge structure, the front end of the rear wheel windshield block is lower than the rear end of the rear wheel windshield block, the front end width is smaller than the rear end width, the outer side of the rear wheel windshield block is an inwards-concave curved surface, the inner side of the rear wheel windshield block is an outwards-convex arc surface, and the inner side arc surface of the rear wheel windshield block is matched with the side-expanded outer side curved surface. According to the design, the influence of the rear wheel on a working area behind the diffuser can be reduced as much as possible, the windward of the rear wheel is reduced to a great extent, the air resistance of the rear wheel is reduced by about 20N, and the jet flow of the rear wheel is effectively controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to an equation formula racing car diffuser and belongs to the vehicular aerodynamics technical field. BACKGROUND

[0002] For FSAE, such a racing event that often needs to accelerate, decelerate and has many bends, enough downforce can increase the tire adhesion as much as possible under the working condition of high-speed driving of the racing car, so that the racing car has higher over-bend limit, better braking performance and better attitude; under ideal working conditions, the diffuser structure of the racing car provides about 40% downforce for the whole vehicle; therefore, fully improving the performance of the diffuser is an important goal of the racing car aerodynamic kit design; due to the influence of factors such as event rules and racing car design, the lifting rod located at the rear of the racing car and the side-mounted radiator will cause the working condition of the diffuser to deteriorate, so that the performance of the diffuser cannot be fully exerted.

[0003] Under the FSAE event, the overall design scheme of the diffuser of each team in China mainly has the following kinds:

[0004] 1. Tail diffuser + side diffuser design: this design aims to minimize the volume and mass of the diffuser, and focuses on the weight reduction of the whole vehicle, and does not rely too much on the downforce provided by the diffuser, in addition, the too large attack angle of the pipeline of the rear diffuser will cause stall.

[0005] 2. Tail diffuser + side diffuser + side multi-piece flap design: this design can increase the downforce to a greater extent than the previous one, and the disadvantages are that the mass and volume are large, and the side-mounted radiator will cause the performance of the diffuser to be unable to fully exert.

[0006] Therefore, we urgently need to design a technical scheme that can maximize the advantages of the above design schemes and avoid their disadvantages as much as possible. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims at: providing a kind of equation formula racing car diffuser with better aerodynamic effect.

[0008] In order to achieve the above object, the technical scheme of the utility model is as follows: a diffuser for a formula racing car, including bottom plate and symmetrically distributed side expansion on both sides of the bottom plate, still including rear wheel wind deflector, rear wheel wind deflector side wall is close to the outside of side expansion, and the bottom of rear wheel wind deflector is detachably fixed on the bottom plate outside the outside of side expansion;Rear wheel wind deflector is triangular wedge structure, the height of its front end is lower than the height of its rear end, and the width of its front end is smaller than the width of its rear end, the outside of rear wheel wind deflector is concave curved surface, the inside is convex curved surface, and the inside curved surface of rear wheel wind deflector is adapted to the curved surface of the outside of side expansion.The design of rear wheel wind deflector minimizes the influence of rear wheel on the working area behind the diffuser, thereby effectively reducing air resistance by about 20N, and controlling rear wheel jet flow.

[0009] Further, the chamfer radius of the front edge of the rear wheel wind deflector is 8-10cm, the front edge height is 27-30cm, the rear end width is 16-18cm, the rear end height is 42-44cm, the arc length of the outside of the wind deflector is 30-34cm, and the arc length of the inside of the wind deflector is 28-30cm.

[0010] Further, the rear wheel wind deflector is made of carbon fiber-epoxy resin composite material to realize light weight and high strength characteristics.

[0011] Further, the rear wheel wind deflector is made of carbon cloth and epoxy resin by skinning.

[0012] Further, the rear end of the bottom plate is provided with a rear working area;The rear wheel baffle is installed on the bottom plate and located behind the side expansion;The outside vortex channel is located at the outermost side of the bottom plate;The bottom plate, the rear working area, the side expansion, the rear wheel baffle and the outside vortex channel are all made by vacuumizing.

[0013] Further, vertical baffles are added on both sides of the rear working area, which to some extent prevent the harmful air flow generated by the rear wheel from flowing to the rear working area.

[0014] The utility model has the advantages that the design can minimize the influence of the rear wheel on the working area behind the diffuser, greatly reduces the windward of the rear wheel, reduces the air resistance of the rear wheel by about 20N, and effectively controls the rear wheel jet flow. BRIEF DESCRIPTION OF DRAWINGS

[0015] The specific embodiments of the application will be further described in detail below with reference to the drawings, in which:

[0016] Figure 1 It is a whole structure schematic view of the utility model a formula racing car diffuser;

[0017] Figure 2 It is a top view structure drawing of the utility model a formula racing car diffuser;

[0018] Figure 3 is a side view structural drawing of the equation formula racing car diffuser of the utility model;

[0019] Figure 4 is a mounting schematic view of the equation formula racing car diffuser on a racing car of the utility model;

[0020] Figure 5 is a side view of the rear wheel wind deflector block of the equation formula racing car diffuser of the utility model;

[0021] Figure 6 is a top view of the rear wheel wind deflector block of the equation formula racing car diffuser of the utility model;

[0022] In the drawing: 1, bottom plate; 2, rear working area; 3, side expansion; 4, rear wheel baffle; 5, rear wheel wind deflector block; 6, outer side vortex passage. DETAILED DESCRIPTION

[0023] The technical scheme of the present application will be further described in detail below with reference to the drawings:

[0024] One embodiment of the equation formula racing car tail wing is shown in Figure 1 , Figure 2 and Figure 3 , which comprises a bottom plate 1, a rear working area 2, a side expansion 3, a rear wheel baffle 4, a rear wheel wind deflector block 5 and an outer side vortex passage 6.

[0025] The rear working area 2, the rear wheel baffle 3, the side expansion 4, the rear wheel wind deflector block 5 and the outer side vortex passage 6 are symmetrically distributed on the axis of the bottom plate 1. The bottom plate 1, the rear working area 2, the side expansion 3, the rear wheel baffle 4 and the outer side vortex passage 6 are all made by vacuumizing.

[0026] The bottom plate 1 is provided with the rear working area 2 at the rear end of the bottom plate 1.

[0027] The side expansion 3 is symmetrically distributed on both sides of the bottom plate 1.

[0028] The rear wheel baffle 4 is installed on the bottom plate 1 and located behind the side expansion 3.

[0029] The rear wheel wind deflector block 5 is tightly attached to the outside of the side expansion 3, and after being punched, is fixed on the bottom plate outside the side expansion through bolts.

[0030] The outer side vortex passage 6 is located at the outermost side of the bottom plate.

[0031] It should be noted that the utility model is a novel racing car diffuser, which is installed on the bottom of the FSAE racing car through drilling holes on the diffuser bottom plate and through bolts when in use. This connecting mode can facilitate the debugging and maintenance of the racing car, and in combination with the structural design, the diffuser is easy to disassemble and assemble while having sufficient reliability.

[0032] A preferred design structure and simulation experiment data: the chamfer radius of the front edge of the rear wheel wind deflector is 9.5 cm, the height of the front edge is 27.8 cm, the width of the rear end is 16.8 cm, the height of the rear end is 42.5 cm, the outer side arc length of the wind deflector is 33.5 cm, and the inner side arc length of the wind deflector is 29.8 cm. The wind deflector can be made by skinning with carbon cloth and epoxy resin. This design can minimize the influence of the rear wheel on the working area behind the diffuser, greatly reduce the windward of the rear wheel, reduce the air resistance of the rear wheel by about 20 N, and effectively control the jet flow of the rear wheel. In addition, vertical baffles are added on both sides of the rear working area, which can prevent the harmful air flow generated by the rear wheel from flowing to the rear working area.

[0033] According to the simulation calculation, under the working condition of a flow rate of 15 m / s, the diffuser generates a downward force of about 197.974 N and a resistance of about 32.410 N. Under the working condition of a flow rate of 22.22 m / s, the diffuser generates a downward force of about 407.850 N and a resistance of about 61.094 N.

[0034] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can understand and think of changes or substitutions within the technical scope disclosed by the present application, which should be covered within the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A diffuser for a formula racing car, which is detachably installed at the bottom of a FSAE racing car, comprising a bottom plate (1) and side diffusers (3) symmetrically distributed on both sides of the bottom plate (1), characterized in that: The rear wheel wind deflector (5) is fixed on the bottom plate (1) outside the lateral extension (3) and has a triangular wedge structure with a lower front end and a higher back end.

2. The equation race car diffuser of claim 1, wherein: The rear wheel wind deflector (5) has a chamfered front edge with a radius of 8-10 cm, a front edge height of 27-30 cm, a back end width of 16-18 cm, a back end height of 42-44 cm, an outer arc length of 30-34 cm, and an inner arc length of 28-30 cm.

3. The formula race car diffuser of claim 1, wherein: The rear wheel wind deflector (5) is made of carbon fiber-epoxy resin composite material.

4. The formula car diffuser of claim 3, wherein: The rear wheel wind deflector (5) is made of carbon cloth and epoxy resin through skinning.

5. The formula car diffuser of claim 1, wherein: The rear end of the bottom plate (1) is provided with a rear work area (2), the rear wheel baffle (4) is installed on the bottom plate (1) and located behind the lateral extension (3), and the outer vortex channel (6) is located at the outermost side of the bottom plate.

6. The formula car diffuser of claim 5, wherein: Vertical baffles are added to both sides of the rear work area (2).

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