The wake of a moving vehicle was stimulated using a wind tunnel with a moving floor. The vehicle models, both scale and block-shaped, were held in a fixed position while the floor moved at the upstream air speed. This simulates an automobile traveling on a straight highway in still ambient air. Vertical and lateral profiles of mean and fluctuating velocities and mean tracer concentration were obtained. Profiles were taken at distances of 15-60 model heights downstream. Two exhaust source positions were used: at the center of the rear of the vehicle and on the side just behind the rear wheel. It was found that the scale vehicles induce a pair of vortices in the wake that modify the velocity and concentration patterns in a minor way from that of the block car.
Turbulent Diffusion Behind Vehicles: Experimentally Determined Influence of Vortex Pair in Vehicle Wake
1987
8 pages
Report
Keine Angabe
Englisch
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