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基于对跨声速轴流压气机内部失稳触发机制的认识,设计了一种新型多圆柱孔式处理机匣结构。对带该处理机匣的跨声速轴流压气机转子Rotor-37的内部流动进行了全三维非定常数值模拟,结果表明该新型多圆柱孔式处理机匣结构可使压气机的综合裕度提高6.5%,而最高效率点效率仅降低0.19%。对多圆柱孔式处理机匣的扩稳机理进行了详细分析,结果表明处理机匣能有效消除低速流体团引起的通道阻塞现象,并将低速阻塞流体团抽吸进入处理机匣容腔,然后从前端喷口预旋喷出以抑制叶顶区域的流动分离,从而有效提高跨声速轴流压气机的失速裕度。
Based on the recognition of the mechanism of instability triggering inside the transonic axial-flow compressor, a new type of multi-cylinder bore casing design was designed. The three-dimensional unsteady numerical simulation of the internal flow of transonic axial compressor rotor Rotor-37 with the casing was carried out. The results show that the new multicylinder casing structure can improve the comprehensive margin of the compressor 6.5%, while the highest efficiency point efficiency decreased by only 0.19%. The mechanism of multi-cylindrical hole receiver expansion is analyzed in detail. The results show that the receiver can effectively eliminate the channel obstruction caused by low-velocity fluid group, and suck the low-speed blocking fluid group into the receiver cavity. Then, Spin out from the front nozzle to prevent the flow separation in the tip region, so as to effectively improve the stall margin of the transonic compressor.