| Citation: | ZHANG Ran, LIU Bo, MAO Xiaochen, et al. Effect of circumferential groove casing treatment on performance of counter-rotating compressor under influence of speed matching effect[J]. Journal of Aerospace Power, 2024, 39（1）：20220148 doi: 10.13224/j.cnki.jasp.20220148
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Numerical simulation method was used to study the stability enhancement effect under different rotational speed matching schemes and the change of first stall stage of counter-rotating compressor (CRC) by performing circumferential groove casing treatment on front and rear rotors of the counter-rotating compressor respectively. The results showed that when the rotational speed of front rotor R1 was higher than that of rear rotor R2, its first stall stage was R1, and when the rotational speed of R2 was equal to or higher than R1, its first stall stage was R2. Casing treatment on first stall stage of the counter-rotating compressor can effectively improve the flow field near blade tip of the treated rotor, including reduction of relative flow angle of inflow, decrease of reverse axial momentum of tip leakage flow, backward movement of interface between tip leakage flow and main flow, and reduction of blade tip blockage, etc., and then improve its stall margin. Generally, the casing treatment can only have a great influence on the flow field of treated rotor, but in special cases, the flow field of non-treated rotor can also be significantly changed.
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