You are here:
TURBULENT DIFFUSION BEHIND VEHICLES: EXPERI-MENTALLY DETERMINED INFLUENCE OF VORTEX PAIR IN VEHICLE WAKE
Citation:
Thompson, R.S. AND R. Eskridge. TURBULENT DIFFUSION BEHIND VEHICLES: EXPERI-MENTALLY DETERMINED INFLUENCE OF VORTEX PAIR IN VEHICLE WAKE. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-87/479 (NTIS PB89201842), 1989.
Description:
The wake of a moving vehicle was simulated using a wind tunnel with a moving floor. he vehicle models, both scale and block-shaped, were held in a fixed position while the floor moved at the upstream air speed. his 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. rofiles were taken at distances of 15-60 model heights downstream. wo exhaust source positions were used: at the center of the rear of the vehicle and on the side just behind the rear wheel. t 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.