Research on the Aerodynamic Characteristics of Vehicle Passing out Tunnel

Abstract

Taking bus driving out of the tunnel as the research background, study the aerodynamic characteristics of the vehicle when the vehicles subjected the sudden change wind load. Numerical wind tunnel model is established. Respectively analysis the vehicle’s aerodynamic change rule of three-component coefficients in the process of vehicle driving out tunnel at different speed under wind load and without wind load. The results show the vehicle’s aerodynamic force increases suddenly when the vehicle run out of the tunnel. The suddenly increasing pressure on vehicle is very adverse impact on the driver’s operation and driving safety.