Study of controlling the lift of car using the technology of followup tail

JI Shiming, CHEN Xianbing

(School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: Aiming at the problems that the car after being lightweight is influented by too much lift that the car had when at high speed with power performance, driving security and operational stability, the ability of the followup tail to control the lift of the car when at high speed was studied. The capability of followup tail with a variety of airfoil to control the lift was summarized, a kind of front and rear symmetrical airfoil was proposed. The capability of followup tail with front and rear symmetrical airfoil to control the magnitude and direction of the lift in different angles of attack was analyzed, by using Fluent to do the air dynamic simulation of the followup tail with front and rear symmetrical airfoil combined the car. The results indicate that when the car have different weight, the followup tail with front and rear symmetrical airfoil can control the lift that the car have when at high speed by adjusting the angle of attack, not only can increase the weight of the car to increase power performance, driving security and operational stability, but also can reduce weight of the car to reduce fuel consumption, increase fuel efficiency, achieve the purpose of energy saving and emission reduction at high speed.

Key words: lift of car; angle of attack; tail; driving security; operational stability