| 吹风比和曲率对旋转曲面气膜冷却效率影响 |
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| 引用本文： | 吴宏,孟恒辉,赵振明,吴宏伟.吹风比和曲率对旋转曲面气膜冷却效率影响[J].北京航空航天大学学报,2009,35(7):812-816. |
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| 作者姓名： | 吴宏 孟恒辉 赵振明 吴宏伟 |
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| 作者单位： | 北京航空航天大学,航空发动机气动热力重点实验室,北京,100191;北京航空航天大学,航空发动机气动热力重点实验室,北京,100191;北京航空航天大学,航空发动机气动热力重点实验室,北京,100191;北京航空航天大学,航空发动机气动热力重点实验室,北京,100191 |
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| 基金项目： | 国家自然科学基金资助项目(59675022) |
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| 摘 要： | 采用数值模拟方法,对旋转状态下曲率表面的气膜冷却进行研究.通过不同的曲率半径和吹风比,得到了冷却效率的分布情况,从而获得吹风比和曲率两因素对气膜冷却效率的影响规律.研究结果表明:低吹风比下,冷却效率较好;高吹风比下,气膜容易脱离壁面;凸表面的冷却效率随着曲率半径的增加而逐渐减小;而凹表面的冷却效率随着曲率半径的增加而逐渐增大;凸表面上曲率的影响作用随着旋转数的增加而逐渐弱化;而凹表面上曲率的作用随着旋转数的增大而逐渐增强.
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| 关 键 词： | 气膜冷却 曲率 旋转 吹风比 |
| 收稿时间： | 2008-06-13 |
Numerical investigation of film cooling effectiveness over rotating curved surfaces:blowing ratio and curvature effect |
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| Wu Hong,Meng Henghui,Zhao Zhenming,Wu Hongwei.Numerical investigation of film cooling effectiveness over rotating curved surfaces:blowing ratio and curvature effect[J].Journal of Beijing University of Aeronautics and Astronautics,2009,35(7):812-816. |
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| Authors: | Wu Hong Meng Henghui Zhao Zhenming Wu Hongwei |
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| Institution: | National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | Numerical method was conducted to investigate film cooling performance over different rotating surfaces.Compared different models,the influences of curve and blowing ration were obtained with different conditions.The results show that: more film cooling effectiveness is obtained in low blowing ratio,and less effectiveness is occurred in high blowing ratio;For convex surfaces,the increasing curvature radius bring less efficiency;and while for concave surfaces,the increasing curvature radius create more effic... |
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| Keywords: | film cooling curvature rotating blowing ratio |
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