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Experiments on film cooling with sonic injection into a supersonic flow

ZHANG Jia SUN Bing

ZHANG Jia, SUN Bing. Experiments on film cooling with sonic injection into a supersonic flow[J]. 航空动力学报, 2015, 30(5): 1084-1091. doi: 10.13224/j.cnki.jasp.2015.05.008
引用本文: ZHANG Jia, SUN Bing. Experiments on film cooling with sonic injection into a supersonic flow[J]. 航空动力学报, 2015, 30(5): 1084-1091. doi: 10.13224/j.cnki.jasp.2015.05.008
ZHANG Jia, SUN Bing. Experiments on film cooling with sonic injection into a supersonic flow[J]. Journal of Aerospace Power, 2015, 30(5): 1084-1091. doi: 10.13224/j.cnki.jasp.2015.05.008
Citation: ZHANG Jia, SUN Bing. Experiments on film cooling with sonic injection into a supersonic flow[J]. Journal of Aerospace Power, 2015, 30(5): 1084-1091. doi: 10.13224/j.cnki.jasp.2015.05.008

Experiments on film cooling with sonic injection into a supersonic flow

doi: 10.13224/j.cnki.jasp.2015.05.008
详细信息
  • 中图分类号: V434

Experiments on film cooling with sonic injection into a supersonic flow

  • 摘要: Film cooling experiments with sonic injection were conducted to investigate the effects of the number of the injection holes, the mass flow ratio, and the hole spacing on the film cooling effectiveness. The mainstream was obtained by the hydrogen-oxygen combustion, entering the experimental section at a Mach number of 2.0. The nitrogen with ambient temperature was injected into the experimental section at a sonic speed. The measured mainstream recovery temperature was approximately 910K. The mass flow ratio was regulated by varying the nitrogen injection pressure. The experimental results show that for the investigated cooling surface, the cooling effectiveness increases with the increase in the number of the injection holes with other parameters held constant. For a fixed cooling configuration, the cooling effectiveness increases with the increase in the mass flow ratio. Different from the subsonic film cooling, the optimal mass flow ratio is not observed. When the hole spacing is less than 4, no obvious difference is observed on the cooling effectiveness and lateral uniformity. With the mass flow ratio increasing further, this difference becomes much smaller. The shock wave also has an effect on the cooling effectiveness. Downstream the incident point of the shock wave, the cooling effectiveness is lower than that in the case without the shock wave.

     

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  • 被引次数: 0
出版历程
  • 收稿日期:  2014-06-16
  • 刊出日期:  2015-05-28

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