透平一级静叶前缘是高温燃气滞止的区域,承受着整个叶片最高的热负荷,是极为重要的冷却部位.本文首先通过压力敏感漆实验得到了前缘在不同布置、吹风比、密度比情况下的绝热气膜冷却有效度分布,结合数值所给出的详细流场和传热信息,深入剖析了前缘气膜冷却的流动传热机制.
The leading edge of the gas turbine first stage nozzle bearing the highest thermal load due to the stagnation of hot gas is believed to be a very important position for cooling.This article measured the distribution of adiabatic film cooling effectiveness at different blowing ratios and density ratios of several leading edge arrangements with pressure sensitive paint technique.With the aid of detailed flow field and heat transfer information provided by CFD,the flow and heat transfer mechanism of leading edge is deeply analyzed.
参考文献
| [1] | S. V. Ekkad;J. C. Han;H. Du .Detailed film cooling measurements on a cylindrical leading edge model: effect of free-stream turbulence and coolant density[J].Journal of turbomachinery,1998(4):799-807. |
| [2] | K. Funazaki;E. Koyabu;S. Yamawaki .Effect of periodic wake passing on film effectiveness of inclined discrete cooling holes around the leading edge of a blunt body[J].Journal of turbomachinery,1998(1):70-78. |
| [3] | H. Reiss;A. Bolcs .Experimental Study of Showerhead Cooling on a Cylinder Comparing Several Configurations Using Cylindrical and Shaped Holes[J].Journal of turbomachinery,2000(1):161-169. |
| [4] | Youn J. Kim;S.-M. Kim .Influence of shaped injection holes on turbine blade leading edge film cooling[J].International Journal of Heat and Mass Transfer,2004(2):245-256. |
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%