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为验证周向浅槽处理机匣的扩稳效果,通过数值仿真的方法,主要探讨了工作于非设计转速下的高负荷轴流压气机上,处于不同轴向位置浅槽式机匣处理及其组合对压气机稳定性的作用。确定了各周向槽于稳定性的主要贡献、机理和处理槽之间的相互影响。研究发现:周向浅槽可以在效率平均下降不到1%的情况下有效地对压气机进行扩稳;通道下游位置的周向槽以线性方式对顶隙泄漏流与扩稳量进行组合影响;另外,通过浅槽的扩稳作用,压气机的失速类型也会发生明显变化。
In order to verify the stabilizing effect of casing with shallow groove, the numerical simulation method is mainly discussed in the case of high-load axial-flow compressor operating at non-designed speed, The effect of the combination on the stability of the compressor. The main contribution of each circumferential groove to stability, the mechanism and the interaction between the treatment troughs are determined. The results show that the circumferential shallow groove can effectively stabilize the compressor under the condition of less than 1% average drop in efficiency. The circumferential groove at the downstream of the channel can affect the leakage flow and the amount of expansion in a linear way ; In addition, by the shallow groove of the expansion of the role of the compressor stalling type will change significantly.