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为了探索不同轴向偏转角处理机匣对压气机稳定裕度的影响,以一个亚声压气机为平台通过实验与数值仿真方法探索了8 130r/min设计转速下3种与轴向成不同角度的处理机匣对该压气机稳定性的作用.详细的分析了各流量工况下不同处理机匣叶顶的流动结构、叶顶载荷分布、处理机匣缝(或槽)内的流动、周向平均后叶顶的损失分布和缝内喷射气流的轴向动量.研究发现:随着缝(或槽)与轴向所成夹角的增大,整个流量范围内,处理机匣的扩稳能力先增强后减弱;大流量工况下,转子叶顶载荷增加,转子的等熵效率降低.
In order to explore the effect of casing with different axial deflection angle on the stability margin of compressor, a subsonic compressor was used as a platform to investigate the effect of three different axial angles at 8 130 r / min on the experimental and numerical simulation. The effects of casing treatment on the stability of the compressor were analyzed in detail.The flow structure at the top of the casing, the distribution of blade tip load, the flow in the casing slit (or groove) The distribution of the average back loss and the axial momentum of jet flow within the slot were studied.The results show that with the increase of the included angle between the slot (or slot) and the axial direction, The capacity first increases and then decreases. At high flow rates, the load on the rotor blade increases and the isentropic efficiency of the rotor decreases.