| タイトル | Computation of losses in a scramjet combustor |
| 著者（英） | Kamath, Pradeep S.; Mcclinton, Charles R. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1992-01-01 |
| 言語 | eng |
| 内容記述 | The losses in a conceptual scramjet combustor at flight Mach numbers of 8, 10, 12, 16 and 20 are computed. These losses are extracted from three-dimensional parabolized Navier-Stokes solutions of the turbulent, reacting combustor flow field. A combustor performance index was defined based on the rationale that an efficient scramjet combustor should add heat to the fluid in such a manner as to maximize the stream thrust at the combustor exit while minimizing the losses. This index showed a decrease of more than 40 percent as the flight Mach number increased from 8 to 20, indicative of a drop in the thrust-producing potential of the scramjet at the upper end of the speed regime studied. A breakdown of the losses showed that dissipation, nonequilibrium chemistry and heat diffusion contributed roughly 15 percent, 35 percent, and 50 percent to the irreversible increase in entropy at Mach 8 and 22 percent, 13 and 65 percent at Mach 20. |
| NASA分類 | AIRCRAFT PROPULSION AND POWER |
| レポートNO | 92A28214
AIAA PAPER 92-0629 |
| 権利 | Copyright |
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