垂直于叶片弦线方向喷气对转子稳定性的影响研究

NASA Rotor37 was used as the research object and the effects of injection on rotor stability were studied by numerical simulation. The research shows that the injection can achieve the stability effect when injection is perpendicular to the chord of the blade. The mechanism of enhancing stability is that the high-speed jet through the nozzle blows the tip leakage flow to the suction surface of the rotor, which weakens the leakage flow at the tip of the blade. The rotor tip blockage area is reduced, and the flow condition of the tip area is improved, thereby achieving the enhancing stability. In the study of the injection flow to the stability of rotor, as the injection flow rate becomes larger, the stability is enhanced. Among the selected 1%, 1.5% and 2% three injection flow levels, 2% of the injection flow can increase the rotor flow margin by 4.24% and the stall margin improvement by 5.16%. In addition, different injection flow has different effects on the flow field of the rotor. In addition to reducing the tip load of the blade leading edge, it can also reduce flow separation of the blade by pushing the shock wave position downstream. It is more advantageous to improve the stability of the rotor.