旋流畸变对跨声速转子性能影响的数值研究

Effects of Swirl Distortion on Transonic Rotor Performance Using Numerical Simulation

关键词:  转子  旋流  畸变  整体涡  对涡  数值仿真  流动分离

Key words:  Rotor  Swirl  Distortion  Bulk swirl  Twin swirl  Numerical simulation  Flow separation

摘要:

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。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。

Abstract:

In order to investigate the effects 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. 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.