Numeral Study On Aerodynamics Of Fsc Race Car Frontwing

This article starts with the theory of vehicle aerodynamics and fluid mechanics,studies the laws and common effects in vehicle aerodynamics and fluid mechanics,and uses Computational Fluid Dynamics methods to solve the air flow field and air force of the formula racing car with the help of computer calculations.On the structural level investigate the related questions of racing aerodynamics.The emphasis is on parametric modeling,with front wing swept angles,uplift angles,etc.as variables,to establish vehicle and front wing models under different design conditions and driving conditions for simulation,and to study the effects of the above variables on the aerodynamics of the car.With aerodynamics theory,the mechanism of the influence of the front wing structure of the racing car on the air force is analyzed.The drag and lift received by the front wing and the vehicle are related to the structural design of the front wing,especially the end plates and small fins.The relationship between drag and lift of the front wing and the sweep angle is related to the upward angle of the front wingspan.The sweep angle at which the maximum lift and drag occur increases with the increase in the angle of rise.The front wing with end plates,when the span-up angle is fixed at 3 degrees,the sweep angle is 8 degrees,the spanwise flow of the airflow on the wing surface is the smallest,the chord speed is the largest,and the largest air force and lift-drag ratio are generated,which is in line with racing cars.The pursuit of aerodynamic design is the optimal design plan of the front wing under the conditions of this paper.In addition,through structural analysis,fluid-solid coupling simulation,and transient dynamics simulation methods,the static strength,dynamic strength and vibration of the structure of the resin-based carbon fiber composite material as aerodynamic parts are analyzed for design verification.The results show that the static safety factor of the main wing of the front wing design is relatively large,and the static strength of the structure is safe.Before the front wing sweep angle increase to 10°,there is little effect on the structural strength.When the sweep angle is larger,the static strength of the structure will decrease.The maximum displacement of the front wing structure appears on the rear side at both ends of the wingspan.The static deformation of the front wing caused by air action forms a negative feedback on the aerodynamic characteristics,and the shape of the front wing does not appear aerodynamic divergence.The time-domain response of the front wing vibration under the air force is obtained through the transient dynamics simulation of fluid-structure coupling.The analysis results show that the front wing vibrates periodically under the transient air force in the flow field.At moderate vehicle speeds,Compared with the steady-state structural deformation,the transient vibration amplitude is relatively small,and the transient fluctuation is not large,which meets the general working requirements of racing cars.