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.
Wilson M, Pilbrow R, Owen J M. Flow and heat transferin a preswirl rotor-stator system[J].Journal of Turbomachinery.1997, 119:364-373
Pilbrow R, Karabay H, Wilson M, et al. Heat transfer in a "cover-plate" preswirl rotating-disk system[J].Journal of Turbomachinery.1999, 121:249-256
Karabay H, Wilson M, Owen J M �� Approximate solutions for flow and heat transfer in pre-swirl rotating-disc systems . ASME2001-GT-0200, 2001
���ǿ,�����,�����⣮���Ľ�������ת��ƽ�����������о�[J]�����ն���ѧ��,1994,9(1):27-30 Xu Guoqiang, Cao Yuzhang, Qiu Xuguang. An investigation on average heat transfer performance for rotating disk with central air inflow[J]��Journal of Aerospace Power,1994,9(1):27-30(in Chinese)
���ǿ��ת��ϵ����ת��ǻ�������������뻻�������о� .����:�������պ����ѧ��Դ�붯������ѧԺ,1999 Xu Guoqiang. An investigation of flow and heat transfer performance for rotating disk .Beijing:School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, 1999(in Chinese)
�����,Cheah S C,Iacovides H,��. ��ת��ǻ�����ٶ���ѹ����ʵ���о�[J]������������ѧ��,1997,18(3):300-305 Ji Honghu, Cheah S C, Iacovides H, et al. An experimental investigation of velocity and pressure distribution inside a rotating disc cavity[J]��Journal of Engineering Thermophysics, 1997,18(3):300-305(in Chinese)
���裮������ת��ǻ�������������뻻�������о� ������:�������պ����ѧ��Դ�빤��ѧԺ,2003 Luo Xiang. Flow and heat transfer between a stator and a rotor with blade cooling holes ��Beijing:School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, 2003(in Chinese)