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A considerable amount is being invested by the vehicle developers in reducing the power needed for propulsion. The vehicle is optimized such to reduce the aerodynamic drag as the drag force is the leading resistance to the motion of vehicle. The flow separation at the rear end of the vehicle is one of the major causes of this drag. This paper investigates the effect of the delta shaped aerodynamic devices, known as vortex generators, installed at the roof of a hatchback type car to delay the flow separation. Mostly vortex generators are used in aircrafts and faster road vehicles with a notch at rear like the sedans. This experiment, unlike the previous researches, investigates and compares the aerodynamic drag and lift of the hatch back vehicle with and without Vortex Generator. Here it is represented that the improvement in aerodynamic drag force reduction, although of very minimal amount, can be achieved by using VGs on hatch back type cars.

Modelling and simulation of aerodynamic performance of Vortex generators for hatch back type cars