| 出口-入口面积比对收缩扩张形孔气膜冷却特性影响的机理研究 |
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| 引用本文： | 李永红,刘存良,朱惠人.出口-入口面积比对收缩扩张形孔气膜冷却特性影响的机理研究[J].航空工程进展,2011,2(1):115-121. |
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| 作者姓名： | 李永红 刘存良 朱惠人 |
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| 作者单位： | 西北工业大学,动力与能源学院,西安,710072 |
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| 基金项目： | 国家973计划项目(2007CB707701) |
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| 摘 要： | 本文选取Realizable k-ε湍流模型和增强壁面函数,采用数值模拟研究了两种出口-入口面积比不同的收缩扩张形孔的气膜冷却机理.结果表明:出口-入口面积比AR变化对收缩扩张形孔气膜冷却的流场、温度场结构特点没有本质的影响,因此对冷却效率和换热系数的分布规律都没有明显影响;但AR变化对收缩扩张形孔的冷却效率和换热系数...
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| 关 键 词： | 气膜冷却 收缩扩张形孔 出口-入口面积比 冷却特性 数值模拟 |
Study on the Physics of Film-cooling of Converging-expanding Holes with Different Exit-entry Area Ratios |
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| Li Yonghong,Liu Cunliang,Zhu Huiren.Study on the Physics of Film-cooling of Converging-expanding Holes with Different Exit-entry Area Ratios[J].Advances in Aeronautical Science and Engineering,2011,2(1):115-121. |
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| Authors: | Li Yonghong Liu Cunliang Zhu Huiren |
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| Institution: | Li Yonghong,Liu Cunliang,Zhu Huiren(School of Power and Energy,Northwestern Polytechnical University,Xi'an 710072,China) |
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| Abstract: | Numerical simulation is carried out to investigate the film cooling mechanism of two converging-expanding holes with different exit-entry area ratios.The Realizable turbulence model with enhanced wall function is used.Results show that as the features of the flow fields and the temperature fields in the two holes are similar with each other,the distribution features of the film cooling effectiveness and the heat transfer coefficient of the two holes are also very similar.However,the cooling effectiveness of... |
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| Keywords: | film cooling converging-expanding hole exit-entry area ratio cooling performance numerical simulation |
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