Abstract
The wind induced by an automobile is studied experimentally by using a hot-wire anemometer. Simplified automobile models which are similar to the Ahmed body with 0-, 25- and 35- slanted back are ran on the traveling slope. The ensemble averaged velocities were obtained at roadside area. The measured velocity profiles showed that the displaced flows around the vehicle nose are identical for three models, however the wake flows behind the models depend strongly on the slant angle. The trailing vortices behind the 25- slanted model travel outward and cause higher velocity and stronger turbulence than other models at roadside. The mirror vortices are attributed to the lateral traveling of the trailing vortex on the road.
