Aerodynamic Drag Features on Automobile with Non-smooth Surfaces

Abstract:

The form of non-smooth surfaces, which is ubiquitous in nature, is applied to automobiles and the feasibility of aerodynamic drag reduction on automobiles is studied by using computational fluid dynamics (CFD) simulation method. Meanwhile, by studying the composition of the air resistance and comparing the external flow field of automobiles with smooth or non-smooth surfaces, the effects of automobile with non-smooth surfaces on pressure drag, induced drag and frictional drag are analyzed together with the mechanism of drag reduction, which provides theoretical basis for a further study of reduction drag effect of non-smooth surfaces.

Key words:automobile, computational fluid dynamics(CFD), non-smooth, air resistance coefficient, drag reduction