Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

作     者：CAI Xu LUO Xiang ZHAO Xi XUGuo-qiang CAI Jun CAI Xu;LUO Xiang;ZHAO Xi;XU Guo-qiang;CAI Jun

作者机构：National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China Dalian Airforce Department of Information Network Communicaiton Non-Commissioned Office Academy Dalian Liaoning 116600 China Guizhou Aero-Engine Research InstituteAviation Industry Corporation of China Guiyang 550081 China 

出 版 物：《航空动力学报》 (Journal of Aerospace Power)

年 卷 期：2015年第30卷第4期

页      面：775-783页

核心收录：

学科分类：08[工学] 082502[工学-航空宇航推进理论与工程] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 0701[理学-数学] 

主　　题：cooling system rotor-stator system flow characteristics pressure distribution resistance coefficient 

摘      要：Experiments were conducted on a typical rotor-stator system where air entered through an annular slot at low radius and flowed out of the cavity axially through a rim seal between the rotor and the stator.For the seal in this rotor-stator system,the stationary shroud overlapped the rotating one.Pressure distributions at the stator surface and flow resistance coefficients of the rotor-stator cavity with a maximum gap of 67mm were measured under different dimensionless mass flow rates from 1.32×104 to 4.87×104 with a large range of rotational Reynolds numbers from 0.418×106 to 2.484×106.The results show that pressure on the stator surface decreases with the increase of rotational Reynolds number when the dimensionless mass flow rate is below 1.3×104;when the dimensionless mass flow rate is above 3.034×104,the trend reverses.This is the so-calledpressure inversion effect.However,dimensionless pressure does not show the same changes when rotational dynamic pressure is chosen as the denominator.The resistance coefficient of the rotor-stator cavity is determined by the dimensionless mass flow rate and rotational Reynolds number;for practical application,the resistance coefficient can also be estimated by the turbulent flow parameter in the range of turbulent parameter from 0.1to 1.6.