Estimation of Drag Force for Various Shapes by using Wind Tunnel

The problem of reducing the vehicles power consumption came closely at the first time when automobile vehicle itself was invented. In the beginning fuelling stations were very low in number and we wanted low fuel consumption automobile which could travel longer distances and so as to increase fuel efficiency of an automobile; there are various parameters that act on the vehicle out of which drag force plays an crucial role in lowering of the fuel efficiency , so reduction of drag force becomes very important challenge for all the major automobile manufacturers because the aerodynamic characteristics and parameters directly affects the stability, driving conditions, safety control operation and fuel consumption of automobiles. The Wind tunnel is used in aerodynamic research activities and it is also used for studying the effect of air which is moving past the solid objects. This paper’s objective is to analyse aerodynamic parameters and flow visualisation over circular, square, semi-circular, aerofoil, etc, shapes using wind tunnel.