组合抽吸对跨音速压气机稳定性影响分析

为研究组合抽吸对跨音速压气机稳定性的作用，以NAsARotor35为研究对象，应用数值模拟手段深入分析了不同抽吸方案对该压气机稳定性以及流场结构的影响效应，数值计算采用商业软件NUMECA结合S-A模型，求解定常NS方程组。研究结果表明：叶表和端壁组合抽吸不仅对压气机的压比和效率性能有较大的提升，同时对压气机内部的流动失稳机制有抑制作用，是一种可行的流动失稳控制策略；叶表抽吸缝主要是吸除叶片吸力面附面层内的低能高熵流体提高压气机的效率，端壁抽吸主要是吸除叶顶内低能高熵流体，改善叶顶复杂流动结构，进而扩大压气机稳定工作范围。

Analysis on Effects of Combined Boundary Layer Suction for Transonic Compressor Stability

The effect of combined boundary layer suction(BLS) on the stability and flow structure of NASA Rotor35 has been investigated by numerical simulation with different schemes of suction, the NUMECA software with S-A model is used to solve the constant N-S equation group. The results show that: combination suction of blade surface and end-wall can not only improve the compressor’s pressure ratio and efficiency highly, but also can restrain the inside instable flow of the compressor, which is a highly feasible control strategy for the compressor instability; blade surface suction improve the compressor’s efficiency by mainly aspirating the lower energy airflow of the blade suction surface layer, and end-wall suction mainly aspirates the lower energy airflow to improve the flow structure near the rotor tip, which could lead to improve the stall margin of the compressor.