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�������պ����ѧѧ�� 2010, Vol. 36 Issue (11) :1271-1274    DOI:
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Effects of cylindrical hole accompanied with anti-vortex holes on film cooling effectiveness
Liu Xiaohong, Luo Xiang, Tao Zhi*
National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� The primary focus was to further understand the flow and heat transfer aspects of a special film cooling hole arrangement where the main film cooling hole was accompanied by two parallel anti-vortex jet holes. The cooling effectiveness and the interaction between the main hot stream and the coolant jets were simulated and compared with the standard single hole arrangement. It is found that the presence of anti-vortex jets decreased the size and the strength of the counter-rotating vortex pair of the main coolant jet and so is its mixing with the main hot stream. The surface film effectiveness value is improved as expected. A bigger diameter of anti-vortex holes means more obvious improvement of film cooling.
Keywords�� film cooling   adiabatic effectiveness   jet   counter-rotating vortex pair     
Received 2009-10-26;
Corresponding Authors: ������     Email: lxiaohong@buaa.edu.cn
About author: ������(1982-),Ů,�������ض���,��ʿ��,lxiaohong@buaa.edu.cn.
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������, ����, ����.��С�׽������ж���Ĥ��ȴЧ�ʵ�Ӱ��[J]  �������պ����ѧѧ��, 2010,V36(11): 1271-1274
Liu Xiaohong, Luo Xiang, Tao Zhi.Effects of cylindrical hole accompanied with anti-vortex holes on film cooling effectiveness[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(11): 1271-1274
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