| Citation: | MA Caidong, HAN Dong, CHENG Bangqin, et al. Experiment on the relationship between stall inception and flow field characteristics on rotor tip casing-wall[J]. Journal of Aerospace Power, 2025, 40（3）：20230453 doi: 10.13224/j.cnki.jasp.20230453
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In order to study the relationship between the stall inception and the flow field characteristics on rotor tip casing-wall, the throttling characteristics of a low-speed isolated rotor axial compressor was experimentally investigated. Dynamic pressure signals were measured during the throttling process by dynamic pressure sensors on the casing-wall at the rotor tip circumferential and chord-wise locations. The flow field characteristics on rotor tip casing-wall before and after the stall inception were analyzed systematically. The results showed that at the near stall condition, the tip leakage flow and the tip secondary leakage flow were in the blade passage, the tip leakage flow was stable at the rotor tip leading-edge; the tip leakage flow in the stall disturbance region swung at the rotor tip leading-edge when the spike-type stall inception occurred, the formation of spike-type stall inception was related to the instability of tip leakage flow in the local area of rotor tip as an external appearance of the tip leakage flow instability; after stall of the compressor, the tip leakage flow in the stall disturbance region spilled from the rotor tip leading-edge, the stall disturbance evolved into stall cell which rotated in circumference. During the experiment, the arrangement method of dynamic pressure sensors can effectively capture the flow field characteristics on rotor tip casing-wall when stall inception occurred.
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