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�������պ����ѧѧ�� 2008, Vol. 34 Issue (01) :51-54    DOI:
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�������պ����ѧ ���շ��������������ص�ʵ����, ���� 100083
Numerical study for film cooling characteristics on rotating model
Yang Bin, Xu Guoqiang, Ding Shuiting, Tao Zhi*
National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� Computations were performed to simulate the two rows of 90° staggered holes film cooling characteristics over a rotating turbine blade model both on leading and trailing surfaces. The influences of the Reynolds number ��Re��, rotation number ��Rt�� and the blowing ratio M on the film cooling effectiveness η and discharge coefficient ��C��d distributions were presented. Results show that the coolant is influenced by the centrifugal force and Coriolis force to deflect towards the high-radius locations, and this will lead to low values of η . The enhancement of ��Re�� can impair the film cooling effectiveness, and the high values of M are not suitable for the thermal protection near the exit of cooling holes. All the discharge coefficients increase with the augmentation of M , and decrease with the increase of Rt . Moreover, the C��d values beside trailing surface are much higher than that beside the leading surface under the same operating conditions.
Keywords�� film cooling   rotation   adiabatic effectiveness   discharge coefficient     
Received 2007-01-22;
About author: �� ��(1982-),��,������,��ʿ��,yb1982@sjp.buaa.edu.cn.
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���,���ǿ,��ˮ͡,����.��ת״̬����Ĥ��ȴģ�͵���ֵģ��[J]  �������պ����ѧѧ��, 2008,V34(01): 51-54
Yang Bin, Xu Guoqiang, Ding Shuiting, Tao Zhi.Numerical study for film cooling characteristics on rotating model[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(01): 51-54
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2008/V34/I01/51
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