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�������պ����ѧѧ�� 2010, Vol. 36 Issue (11) :1286-1289    DOI:
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�����, �˺���, Ф��*
�������պ����ѧ ���շ��������������ص�ʵ����, ���� 100191
Film cooling characteristics on pressure side of rotating turbine blade
Li Guoqing, Deng Hongwu, Xiao Jun*
National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ ͨ��1.5������ҶƬ��ת��Ĥ��ȴʵ��,��ʾ����������ҶƬ����ת״̬�µ���Ĥ��ȴ����.ʵ����,������ŵ��Ϊ8×104,��ת���ֱ�Ϊ2.092,2.324��2.448,����ȴ�0.3��3.0�仯,��ȴ���ʷֱ���ÿ����Ͷ�����̼,��Ӧ���������ܶȱȷֱ�Ϊ1.03��1.57.ҶƬ�������п��Һ��,ͨ���߾���CCD����õ������¶ȳ�.�������:ѹ������,��Ĥ��ȴЧ���洵��ȵ����������,����ת�������������;��Ĥ�켣��߰뾶����ƫת,ƫת�̶�����ת����������Ӿ�;������������ܶȱ�,�����������ȴЧ��.
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Abstract�� Experimental investigations were carried on to indicate the rotating film cooling characteristics in a 1.5 turbine stage. The length of the tested blade in chordwise and spanwise was 124.3�\mm and 99�\mm respectively with a 4�\mm film hole in the middle span oriented 28° to the tangential of the pressure side in streamwise. The mainflow Reynolds number Reg was 8×104. The blowing ratio varied from 0.3 to 3.0. Three rotating number (Rt) of 2.092, 2.324 and 2.448 were focused on. Air and CO2 worked as coolant to achieve the coolant to mainflow density ratio of 1.03 and 1.57 respectively. Thermo liquid crystal was employed to show the temperature distribution on pressure side surface which was captured by CCD. Results show that the film cooling effectiveness is increased with the blowing ratio rising while it is decreased with the Rt rising. Meanwhile, increasing Rt could lead the film trajectory to deflect more centrifugally. But it deflect less centrifugally with the blowing ratio rising under the same Rt. High density ratio could improve the film cooling effectiveness dramatically.
Keywords�� film cooling   turbine blade   effectiveness   rotating     
Received 2009-10-23;
Corresponding Authors: �����     Email: liguoqing@sjp.buaa.edu.cn
About author: �����(1981-),��,�ӱ�������,��ʿ��,liguoqing@sjp.buaa.edu.cn.
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�����, �˺���, Ф��.��ת״̬������ҶƬѹ������Ĥ��ȴ����[J]  �������պ����ѧѧ��, 2010,V36(11): 1286-1289
Li Guoqing, Deng Hongwu, Xiao Jun.Film cooling characteristics on pressure side of rotating turbine blade[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(11): 1286-1289
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