Investigating the flow characteristics in the cavity by changing the rotor profile of the rotor-stator system is of considerable significance, this paper simplifies clearance flow to rotor-stator cavity flow. The numerical simulation results are compared with the experimental results of the windage torque of the rotor-stator system, and the results show that the accuracy of the numerical calculation meets the requirements. The inlet flow rate and outlet gap were unchanged, and the flow in the concave cavity was most similar to the original model. The torque increased slightly and was more entrained, while the flow pattern of the convex cavity was more chaotic, and various forms of vortices appeared in the rotor boundary layer. The interference of the rotor and stator disks and the viscous effect of the fluid in the cavity are the main reasons for the generation of torque, and the Reynolds stress near the rotor wall also contributes partly to the torque. After data processing, an interesting phenomenon was observed. In the boundary layer of the rotor, the radial flow in which the inertial force plays a major role is transformed into a circular motion dominated by the rotation of the rotor.

通过改变转子-定子系统的转子轮廓来研究空腔内的流动特性具有重要意义，本文将间隙流动简化为转子-定子空腔流动。将数值模拟结果与转子-定子系统风阻力矩的实验结果进行对比，结果表明数值计算的精度满足要求。入口流量和出口间隙不变，凹腔内的流动与原始模型最相似。扭矩略有增加，夹带更多，而凸腔流态更混乱，转子边界层出现各种形式的涡流。转子和定子盘的干涉和腔内流体的粘性作用是产生转矩的主要原因，转子壁附近的雷诺应力也对转矩有部分贡献。数据处理后，观察到一个有趣的现象。在转子的边界层中，惯性力起主要作用的径向流动转变为以转子旋转为主的圆周运动。