旋流畸变对跨声速转子性能影响的数值研究

为了探究整体涡和对涡旋流对跨声速转子性能的影响，利用腔室型旋流畸变发生器产生旋流，并与跨声速转子进行联合仿真研究。90%换算转速B3布局时，同向整体涡导致转子压比最大降幅为15.1%，效率最大增幅为10%；反向整体涡导致转子压比最大增幅为6.75%，效率最大降幅为17.2%；对涡P3布局时转子压比和效率的最大降幅分别为4.3%和9.3%。结果表明同向整体涡减小了叶片负荷与叶片表面及通道内的二次流分离，使转子的压比降低，效率升高；反向整体涡增大了叶片负荷，使流动分离损失增加，转子的压比升高，效率降低；对涡旋流可认为是同向整体涡和反向整体涡的叠加，对转子性能的影响取决于占主导的旋流类型，影响机制与整体涡相同。

Effects of Swirl Distortion on Transonic Rotor Performance Using Numerical Simulation

In order to investigate the effect of bulk swirl and twin swirl on the performance of transonic rotors, the chamber-shaped swirl generator was used to produce the swirl and the combined simulation of rotor and swirl generators was carried out. In the condition of B3 configurations and 90% corrected speed, the maximum pressure ratio of the rotor decreases by 15.1% and the maximum efficiency increases by 10% due to the positive bulk swirl, and the maximum pressure ratio of rotor increases by 6.75% and the maximum efficiency decreases by 17.2% due to the negative bulk swirl. The maximum reduction of rotor pressure ratio and rotor efficiency was 4.3% and 9.3% respectively for P3 layout of twin swirl. The results show that the positive bulk swirl reduces the blade load and the secondary flow separation on the blade surface and in the passage, which reduces the pressure ratio and increases the rotor efficiency. The negative bulk swirl increases the blade load, increases the flow separation loss, increases the rotor pressure ratio and reduces the efficiency. The twin swirl can be considered as the superposition of the positive bulk swirl and the negative bulk swirl. The influence on the rotor performance depends on the dominant swirl type, and the influence mechanism is the same as the bulk swirl.