《Tab.4 Specific results of different radial width of circumferential grooves》

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《离心压缩机周向槽壁面处理的数值研究（英文）》

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From the above analysis，we can indicate that the CGCTs supplies a recirculation passage for the low momentum fluid near the diffuser casing wall at near-stall operating conditions.The low momentum fluid is sucked into the treated casing groove and transports along the circumferential and streamwise directions in the groove.Thus，the initiation of stall is delayed，and the overall contribution of each groove to SMI depends on the compound effect of suction-reinjection.