引气对跨声速压气机稳定性的影响

Taking the NASA Rotor 37 as an object of study, the influence of tip bleeding on the stability of the rotor was numerically simulated. Results show that tip bleeding could help to improve the stability of the rotor. The mechanism of stability enhancement comes from the suction action of tip bleeding, which reduces the area of tip blockage, and therefore enhances the flow capability in the tip region. The bleed position and flow rate interactively affect the rotor stability. At the bleed flow rate of 0.5% and 1.0%, the stable working margin of rotor gradually reduces with the bleed position moving backward; at the bleed flow rate of 1.5%, with the bleed position moving backward, the stable working margin tends to increase first and then decrease. When the bleed position is fixed at 20%C, the stable working margin of rotor increases first and then decreases with the increase of bleed flow rate; and when the bleed position is respectively at 60%C and 100%C, as the bleed flow increases, the stable working margin of rotor gradually increases accordingly.