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Unsteady body force model for rotating stall in axial compressor with various inlet conditions

Guo Jin

Journal of Theoretical and Applied Mechanics

2024

Vol. 62 nr 1

31--45

To analyze the dynamic stall of multistage axial compressors, a three-dimensional unsteady numerical model is established based on the body force model. For a two-stage axial com- pressor with a clean inlet, the calculated maximum steady static pressure rise coefficient is only 0.1% different compared with the experimental data. The characteristic frequency of the dynamic stall evolution basically agrees with the experimental results, which proves the effectiveness of the model. For the compressor with a combined radial-circumferential total pressure inlet distortion, the predictions preliminarily verify the ability of the model for qualitative description of the flow instability process with the complex inlet distortion.