| タイトル | Chemical and thermal nonequilibrium heat transfer analysis for hypervelocity, low Reynolds number flow |
| 著者（英） | Brown, K. G. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1985-06-01 |
| 言語 | eng |
| 内容記述 | Chemical and thermal nonequilibrium phenomena are studied in the stagnation region of a hypervelocity blunt body. This investigation is motivated by the need to predict the heat transfer rate to the leading edge of Aeromaneuvering Orbital Transfer Vehicles. Flight speeds of approximately 10 km/s at altitudes of approximately 80 km are considered for body radii of 1 to 50 cm. The analysis is based on continuum theory and is applicable to the viscous-layer and incipient-merged-layer rarefied-flow regimes. A two-species, two-temperature gas model is assumed. Comparisons are made with previous theories, experimental data, and results based on the thermodynamic equilibrium assumption. The equation accounting for vibrational nonequilibrium is presented and its effects on flow properties are discussed. Parameters which require further investigation are identified. Preliminary results indicate that the inclusion of vibrational relaxation has little effect on heat transfer rate for a catalytic surface. However, vibrational nonequilibrium may increase the heat transfer rate to a noncatalytic surface, depending on the degree of nonequilibrium. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 85A38947
AIAA PAPER 85-1033 |
| 権利 | Copyright |
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