| タイトル | Buoyancy effects on flames spreading down thermally thin fuels |
| 著者（英） | Altenkirch, R. A.; Shang, P. C.; Eichhorn, R. |
| 著者所属（英） | Kentucky Univ. |
| 発行日 | 1980-01-01 |
| 言語 | eng |
| 内容記述 | Experiments show that buoyancy influences the downward spread rate of flames consuming thermally thin fuel beds. For index cards (0.0098 cm half-thickness) and adding-machine tape (0.0043 cm half-thickness), an increase in the buoyancy level causes the spread rate to drop until no flame propagation is possible. A dimensionless spread rate is found to correlate with a Damkoehler number. As the Damkoehler number increases with decreasing buoyancy level brought about by an increase in pressure or a decrease in gravity, the dimensionless spread rate approaches unity. It is also found that a small change in orientation with respect to the vertical is equivalent to a change in the magnitude of gravity in the direction of spread, and power-law relations between the dimensional spread rate and pressure are only valid over a small pressure range. |
| NASA分類 | INORGANIC AND PHYSICAL CHEMISTRY |
| レポートNO | 80A19072 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/423418 |
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