| 扩展型面排孔气膜冷却的实验 |
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| 引用本文： | 杨成凤,张靖周,陈利强,吴世勋.扩展型面排孔气膜冷却的实验[J].航空动力学报,2008,23(10):1765-1771. |
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| 作者姓名： | 杨成凤 张靖周 陈利强 吴世勋 |
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| 作者单位： | 南京航空航天大学 能源与动力学院, 南京 210016 |
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| 摘 要： | 设计了三种型面的气膜孔扩展结构,研究了气膜冷却效率、壁面换热系数及流量系数随吹风比的变化规律.研究结果表明,与典型的圆柱形气膜孔相比,有后向扩展型面的气膜孔具有相对较高的冷却效率和换热系数,流量系数略有降低.扩展型面的流向扩展角对冷却效率和换热系数的影响大于侧向扩展角的影响.侧向扩展角只在特定吹风比下才对提高气膜的侧向覆盖率、进而提高气膜冷却效率起作用,它使得位于二次流出流下游的低压区域范围增大,流量系数减小.
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| 关 键 词： | 气膜冷却 扩展型面 冷却效率 换热系数 |
| 收稿时间： | 2007/9/22 0:00:00 |
| 修稿时间： | 2007/12/21 0:00:00 |
Film cooling experiment of row of expanded shape holes |
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| YANG Cheng-feng,ZHANG Jing-zhou,CHEN Li-qiang and WU Shi-xun.Film cooling experiment of row of expanded shape holes[J].Journal of Aerospace Power,2008,23(10):1765-1771. |
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| Authors: | YANG Cheng-feng ZHANG Jing-zhou CHEN Li-qiang and WU Shi-xun |
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| Institution: | College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | Three types of expanded shape film-cooling holes were designed to study the change of the film cooling efficiency,heat transfer coefficient at the wall and flow discharge coefficient with the blow ratio.The result shows that: the film cooling efficiency and heat transfer coefficient of the expanded film cooling holes are higher than the typical round film cooling holes,but the flow discharge coefficient is lower.The effect of the streamwise expanded angle on the film cooling effectiveness and heat transfer ... |
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| Keywords: | film cooling shaped holes cooling effectiveness heat transfer coefficient |
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