不同轴向引气位置对自循环机匣处理的影响研究

For the specific flow condition of the tip of the rotor during stalling, based on the purpose of pumping the low velocity fluid in the blockage area of the tip, four sets of self-circulating casing treatment schemes are designed to explore the difference between the expansion mechanism and the conventional self-circulation casing treatment. The Euranus solver of the Numeca Fine software package is used in the numerical calculation. The calculation results show that the self-circulating casing treatment structure designed by pumping the low-speed fluid in the plugging area of the tip is more stable than the conventional self-circulating casing treatment. In the optimized design, when the axial bleed air position is located at the core of the rotor tip blockage area, the achieved stabilization effect is best, and the maximum comprehensive margin improvement can reach 15.00%. In addition, the paper also analyzes the difference of the top flow field after the self-circulating casing treatment, and concludes that the expansion mechanism of the self-circulating casing treatment is to suck away the low-speed airflow causing the blockage flow in the tip area, suppress the leakage flow at the tip, and improve the flow condition in the tip area, which is used to expand the stable working range of the rotor.