| Main Title |
Experimental and Theoretical Study of the Wake of a Block-Shaped Vehicle in a Shear-Free Boundary Flow. |
| Author |
Eskridge, Robert E. ;
Thompson, Roger S. ;
|
| CORP Author |
Environmental Sciences Research Lab., Research Triangle Park, NC. |
| Year Published |
1982 |
| Report Number |
EPA-600/J-82-109; |
| Stock Number |
PB83-188920 |
| Additional Subjects |
Wakes ;
Exhaust emissions ;
Air pollution ;
Motor vehicles ;
Dispersions ;
Wind tunnels ;
Test chambers ;
Atmospheric boundary layers ;
Highways ;
Profiles ;
Reprints ;
Numerical solution
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB83-188920 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
18p |
| Abstract |
The wake of a moving vehicle was simulated using a specially-constructed wind tunnel with a moving floor. A 'block-shaped' model vehicle was fixed in position over the test-section floor while the floor moved at the freestream air speed to produce a uniform, shear-free, approach flow. This simulates an automobile traveling along a straight highway under calm atmospheric conditions. Two new theories for the velocity deficit are compared to the theory of Eskridge and Hunt (1979). A theory which considered a height-dependent eddy viscosity was found to fit the data best. Length and velocity scales were found for the longitudinal variation of the turbulent kinetic energy. The lateral variation is described by a two-dimensional numerical fit of the crosswind variation of the data. |
| Supplementary Notes |
Pub. in Atmospheric Environment, v16 n12 p2821-2836 1982. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Experimental and Theoretical Study of the Wake of a Block-Shaped Vehicle in a Shear-Free Boundary Flow. |
| PUB Date Free Form |
15 Mar 82 |
| Category Codes |
20D; 46B; 68A |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
320322753 |
| Origin |
NTIS |
| Type |
CAT |
