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�������պ����ѧѧ�� 2006, Vol. 32 Issue (08) :922-925    DOI:
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�������պ����ѧ ���շ��������������ص�ʵ����, ���� 100083
Heat transfer measurements on a rotating disk with discrete receiver holes
Luo Xiang, Xu Guoqiang, Tao Zhi, Ding Shuiting*
National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� Modern gas turbines are cooled using air diverted from the compressor. In a rotor stator system, the cooling air enters at the center of stator and flows radially outward, then leaves through the discrete receiver holes in the rotor and clearance between rotor and shroud. The rotor with 440�Nmm diameter has 60 blade-cooling holes with 6�Nmm diameter at a radius of 195�Nmm.The temperatures on rotor surface at a number of radial locations were measured by thermocouples. The average Nusselt numbers on the rotating disc ��Nu��av,d and on the surface of receiving holes ��Nu��av,b were determined by experiment results. The magnitude of them was governed by two nondimensional fluid-dynamic parameters: rotational Reynolds number, nondimensional mass flow rate. The experiments reveal that ��Nu��av,d and ��Nu��av,b are increasing as either of them increases. The Nusslet number ��Nu��av,d increases strongly with rotational Reynolds number and weekly with nondimensional mass flow rate compared to the rotating disk without receiver holes.
Keywords�� rotating disks   rotors   stators   heat transfer coefficients     
Received 2005-09-21;
About author: �� ��(1973-),��,�Ĵ��ɶ���,��ʿ��, xiang.luo@buaa.edu.cn.
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����, ���ǿ, ����, ��ˮ͡.������ɢ�����׵���ת��ƽ����������[J]  �������պ����ѧѧ��, 2006,V32(08): 922-925
Luo Xiang, Xu Guoqiang, Tao Zhi, Ding Shuiting.Heat transfer measurements on a rotating disk with discrete receiver holes[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(08): 922-925
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