| Citation: | XU Wenfeng, ZOU Shilong, REN Guozhe, et al. Study on the influences of the labyrinth seal structure on the compressor cascade performance[J]. Journal of Aerospace Power, 2025, 40（12）：20240075 doi: 10.13224/j.cnki.jasp.20240075
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In order to study the influences of labyrinth seal on compressor cascade performance, the high-load compressor linear cascade was taken as the research object, five different labyrinth seal structures were designed, and the influences of five kinds of labyrinth seal structures on the cascade performance and flow field structure were studied by numerical simulation. The results showed that the total pressure loss of the cascade gradually increased and the blade load capacity gradually decreased as the leakage induced by the labyrinth cavity increased. Various labyrinth seal structures improved the flow condition in the cascade by reducing the clearance leakage flow, thereby improving the blade load capacity and reducing the flow loss. Among the five schemes, the straight tooth with square structure had the most significant improvement effect on the flow field structure and aerodynamic performance of the cascade. By blocking the tip jet, it increased the tip flow resistance, reduced the leakage flow of the labyrinth, and weakened the influence of the leakage flow of the labyrinth on the corner separation flow of the suction surface. It can reduce the volume of low-energy fluid in the corner by 32.1%, inhibit the influence range of the concentrated shedding vortex, and then reduce the total pressure loss by 20%.
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