| 圆孔与侧扩孔气膜冷却的大涡模拟 |
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| 引用本文： | 王扬平,姜培学.圆孔与侧扩孔气膜冷却的大涡模拟[J].工程热物理学报,2007,28(6):1016-1018. |
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| 作者姓名： | 王扬平 姜培学 |
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| 作者单位： | 热能动力工程与热科学重点实验室,清华大学热能工程系,北京,100084 |
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| 摘 要： | 本文对圆孔和带有侧向扩散出口的侧扩孔气膜冷却进行了大涡模拟计算,对温度场和流场的发展进行了比较和分析.计算结果表明,圆孔形成的成股的冷却射流,与壁面分离明显,使得高温主流被卷席入气膜区域;侧扩孔所形成的冷却气膜没有脱离壁面,并且通过两侧的小股冷却气膜扩宽了横向扩散,可以很好地将高温主流排挤到气膜的两侧,因此可以获得更好的冷却保护效果.
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| 关 键 词： | 气膜冷却 大涡模拟 气膜孔形状 数值计算 |
| 文章编号： | 0253-231X(2007)06-1016-03 |
| 修稿时间： | 2007年4月12日 |
LARGE EDDY SIMULATION OF CYLINDRICAL AND DIFFUSED HOLE FILM COOLING |
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| WANG Yang-Ping,JIANG Pei-Xue.LARGE EDDY SIMULATION OF CYLINDRICAL AND DIFFUSED HOLE FILM COOLING[J].Journal of Engineering Thermophysics,2007,28(6):1016-1018. |
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| Authors: | WANG Yang-Ping JIANG Pei-Xue |
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| Abstract: | Film cooling induced by both traditionally cylindrical hole and lateral-diffused hole was simulated by Large eddy simulation(LES).The numerical results of temperature distributions and flow fields shown that coolant injected from cylindrical hole detached from wall surface concentrating as a central column,below which hot gas was entrained into cooling zone.Providing wider spreading and better attachment,lateral diffused hole was found to be superior over cylindrical one. |
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| Keywords: | film cooling large eddy simulation shaped film-hole numerical simulation |
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