本文对扩张通道和直通道中的超音速气膜冷却进行了数值模拟,分析了主流加速和不加速两种情况下超音速气膜冷却的差异.计算结果表明,在主流加速的情况下,超音速气膜冷却的效果要好于相同进口条件下主流不加速的情况,并且这种差异越到下游越明显.同时,在本文计算的工况范围中,无论主流加速还是不加速,增大主流进口马赫数或者减少冷却流进口马赫数都使气膜冷却效率下降,而壁面静压则由主流气体决定.
参考文献
| [1] | 葛绍岩;刘登瀛;徐靖中.气膜冷却[M].北京:科学出版社,1985 |
| [2] | Hartnett J P;Birkebak R C;Eckert E R G.Velocity Distributions,Temperature Distributions Effectiveness and Heat Transfer in Cooling of a Surface with a Pressure Gradient[J].International Development in Heat Transfer,Part 4,ASME,1961:682-689. |
| [3] | Carlson L W;Talmor E .Gaseous Film Cooling at Various Degrees of Hot Gas Acceleration and Turbulence Levels[J].International Journal of Heat and Mass Transfer,1968,11:1695-1713. |
| [4] | Lutum E;Wolfersdorf J;Semmler K et al.An Experimental Investigation of Film Cooling on a Convex Surface Subjected to Favorable Pressure Gradient Flow[J].International Journal of Heat and Mass Transfer,2001,44:939-951. |
| [5] | E. Lutum;J. von Wolfersdorf;B. Weigand;K. Semmler .Film cooling on a convex surface with zero pressure gradient flow[J].International Journal of Heat and Mass Transfer,2000(16):2973-2987. |
| [6] | Lutum E;Wolferedorf J;Semmler K et al.Film Cooling on a Convex Surface:Influence of External Pressure Gradient and Mach Number on Film Cooling Performance[J].Heat and Mass Transfer,2001,38:7-16. |
| [7] | Juhany K A;Hunt M L .Flowfield Measurements in Supersonic Film Cooling Including the Effect of Shock-Wave Interaction[J].American Institute of Aeronautics and Astronautics,1994,32:578-585. |
| [8] | 王保国;刘淑艳;黄伟光.气体动力学[M].北京:北京理工大学出版社,2005:170. |
| [9] | K A Juhany;M L Hunt;J M Sivo .Influence of Injectant Mach Number and Temperature on Supersonic Film Cooling[J].Journal of Thermophysics and Heat Transfer,1994,8:59-67. |
| [10] | Valery P. Lebedev;Vadim V. Lemanov;Victor I. Terekhov .Film-Cooling Efficiency in a Laval Nozzle Under Conditions of High Freestream Turbulence[J].Journal of heat transfer: Transactions of the ASME,2006(6):571-579. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%