Main Title |
Turbulent diffusion behind vehicles : experimentally determined influence of vortex air in vehicle wake / |
Author |
Thompson, Roger S. ;
Eskridge, R. E.
|
Other Authors |
|
CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. |
Publisher |
U.S. Environmental Protection Agency, Atmospheric Sciences Research Laboratory, |
Year Published |
1987 |
Report Number |
EPA/600/J-87/479 |
Stock Number |
PB89-201842 |
Additional Subjects |
Air pollution ;
Automobiles ;
Wakes ;
Motor vehicles ;
Exhaust gases ;
Exhaust emissions ;
Aerodynamics ;
Vortices ;
Wind tunnels ;
Highways ;
Graphs(Charts) ;
Reprints ;
Automobile exhaust ;
Diffusion modeling
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB89-201842 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
8 pages ; 28 cm |
Abstract |
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. |
Notes |
"Journal article." "EPA/600/J-87/479." "Published in Atmospheric Environment, vol. 21, no. 10 pp. 2091-2097, 1987." Microfiche. |