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Numerical investigation of film cooling effectiveness over rotating curved surfaces:blowing ratio and curvature effect
Wu Hong, Meng Henghui, Zhao Zhenming, Wu Hongwei*
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 efficiency; The increasing Rotation number weakens curvature effect on convex surfaces, while strengthens curvature effect on concave surfaces.
Keywords�� film cooling   curvature   rotating   blowing ratio     
Received 2008-06-13;
Fund:

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About author: �� ��(1971-),��,�����ֳ���,������,wuhong@buaa.edu.cn.
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�� ��, �Ϻ��, ������, ���ΰ.����Ⱥ����ʶ���ת������Ĥ��ȴЧ��Ӱ��[J]  �������պ����ѧѧ��, 2009,V35(7): 812-816
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 A, 2009,V35(7): 812-816
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