| Main Title |
Video Image Analyses of the Cross-Stream Distribution of Smoke in the Near Wake of a Building. |
| Author |
Huber, A. H. ;
Arya, S. P. S. ;
|
| CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. ;North Carolina State Univ. at Raleigh. Dept. of Marine, Earth and Atmospheric Sciences. |
| Year Published |
1988 |
| Report Number |
EPA/600/D-88/066; |
| Stock Number |
PB88-196167 |
| Additional Subjects |
Smoke ;
Dispersion ;
Tests ;
Wind tunnels ;
Wakes ;
Buildings ;
Images ;
Computer programs ;
Image intensifiers ;
Analyzing ;
Variation ;
Measurement ;
Digital techniques ;
Air pollution ;
Image analysis ;
Image enhancement ;
Video data ;
Wind tunnel tests
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB88-196167 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
In a wind-tunnel study, recorded video images of the top view of smoke dispersion in the wake of a building were analyzed. A continuous source of smoke was emitted at floor level, midway along the leeward side of the building. The technique and usefulness of analyzing video images of smoke is demonstrated in a study of building effects on smoke dispersion. The presentation discusses how the video image intensity is corrected for background intensity and then normalized to a scale of 0 to 100 percent. Profiles of the normalized image mean intensity are compared with similar profiles for the mean concentration of hydrocarbon tracer. The distributions of intensity of cross-stream profiles are discussed. These distributions were analyzed in time and space. Also, time-averaged cross-stream profiles of mean, standard deviation, and other statistics of image intensity are compared with traditional concentration measurements for symmetric wake flow. |
| Supplementary Notes |
Prepared in cooperation with North Carolina State Univ. at Raleigh. Dept. of Marine, Earth and Atmospheric Sciences. |
| PUB Date Free Form |
Apr 88 |
| Category Codes |
68A; 68; 51F |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
819620478 |
| Origin |
NTIS |
| Type |
CAT |
