Numerical analysis on the relationship between aerodynamic drag coefficient and 3d molding of rear view mirror

Based on numerical calculation theory of fluid mechanics and modeling theory, the influence of rear view mirror´s complex curved surface on aerodynamic drag coefficient was analyzed to construct low drag coefficient and high quality surface. Extracted two-dimensional isoparm and analysed the position, tangency and curvature continuous curve separately to realize the aim of reducing 35% of shape resistance coefficient. Then construct three-dimensional surface using isoparm from 3D drawing to verify that under the condition of invariable windward acreage, modifying surface modeling can decrease the rearview mirror aerodynamic coefficient. carried out fluid numerical analysis on 25 kinds of curves and 9 kinds of surface using software FLUENT totally. The data can not only be used to improve the rearview mirror shape, reduce drag coefficient and automobile fuel consumption, but also be used as reference to research blunt body e.g. car body styling which creates turbulence tempestuously.