粗糙度对大间隙环流偏心转子动特性系数的影响

Effect of Stator and Rotor Wall Roughness on Dynamic Coefficients of Eccentric Rotor in Large Gap Annular Flow

基于作者建立的大间隙环流中转子运动的理论模型 ,用摄动法推导了大间隙环流流场非线性控制方程的一阶摄动方程 ,采用数值方法研究了静子和转子壁面粗糙度对大间隙环流中偏心转子动特性系数的影响 .研究结果表明 :静子和转子壁面粗糙度对大间隙环流中偏心转子动特性系数有较大影响 .所得到的数值结果与已有的解析解和实验结果具有较好的一致性 .

Based on the turbulent bulk flow theory, Moody wall friction coefficient equation, and our previous work, the first order perturbation equations of non linear governing equations of the large gap annular flow field has been derived by means of perturbation method. The effects of stator and rotor wall roughness on the dynamic coefficients of the eccentric rotor in large gap annular flow have been investigated with numerical method. It has been found that the numerical results of the dynamic coefficients agree well with the existing analytical solutions and experimental results. The roughness of the rotor and/or stator wall has considerable effect on the dynamic coefficients of rotor in large gap annular flow.