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以双级对转压气机为研究对象,通过在两排转子机匣处开设抽吸孔,采用数值方法研究了不同抽吸流量下端壁附面层抽吸对压气机性能的影响,为吸附式压气机优化设计提供参考。计算结果表明:在级环境下端壁附面层抽吸可以提升压气机失速裕度,但抽吸流量过大会对效率造成一定损失,当抽吸1.6%流量时失速裕度提升了3.8%,压气机性能达到最佳;失速主要由间隙泄漏涡引起并首先在第二排转子叶尖发生,抽吸削弱了泄漏涡的强度推迟失速发生;端壁附面层抽吸增大了叶尖流通能力,使转子叶尖效率和压比得到提升,并有效改善了出口导叶流场。
A two-stage rotary compressor is taken as the research object. By using suction holes in the two rows of rotor casings, the influence of the suction on the end wall under different suction flow rates on the performance of the compressor is studied numerically. Compressor optimization design for reference. The calculation results show that the end-wall suction can improve the stall margin of the compressor, but the excessive suction flow will cause some loss of efficiency. The stall margin increases 3.8% when pumping 1.6% Machine performance to achieve the best; Stall mainly caused by the gap leakage vortex and the first in the second row of rotor tip, suction weaken the strength of the leakage vortex delay stall occurred; end wall surface layer suction increases tip flow capacity , The rotor tip efficiency and pressure ratio are improved, and effectively improve the export guide vane flow field.