运用有限差分方法对一台设计工况下的层板发汗冷却推力室的壁温特性进行了数值模拟。计算结果表明：壁温相同情况下，发汗冷却推力室承受的燃气温度可比膜冷却方式提高约1000; 燃气温度相同时，发汗冷却推力室的壁温较非发汗冷却降低约50%; 层板室壁温度梯度集中在燃气侧; m1/2越大，层板室壁内部换热效率越高，层板内壁温度越低，内、外壁温差越大。
A numerical simulation using the finite difference method is performed on thewall temperature of the transpiration cooled thrust chamber with the plateletdesign. The numerical results show that: for the same wall temperature, the gastempeature that the transpiration cooling withstands can be raised by1000 compared to the film cooling; for the same gas temperature, thewall temperature of the transpiration cooling can be lowered by 50% comparedto the non-transpiration cooling; the platelet wall temperaure gradient on thegas side is very large; for a certain platelet wall, an increase ofm1/2 will results in a decrease of inner-wall temperature and an increaseof inner-to-outer temperature difference.
参考文献
| [1] | Keener D;Lenertz R;Bowersox R et al.Transpiration CoolingEffects on Nozzle Heat Transfer and Performance[R].AIAA 95-2497 |
| [2] | Mueggenburg H H;Hidahl J W;Kessler E L et al.Platelet ActivelyCooled Thermal Management Devices[R].AIAA 92-3127 |
| [3] | 邓澍 .层板推力室发汗冷却的数值分析[D].上海交通大学,1998. |
| [4] | 吴慧英,程惠尔,邓澍.层板室壁无相变流动时的冷却性能[J].热能动力工程,2000(01):18-19. |
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