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Effects of Tip Leakage Flow on the Aerodynamic Performance and Stability of an Axial-Flow Transonic Compressor Stage

Author

Listed:
  • Botao Zhang

    (School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China)

  • Xiaochen Mao

    (School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China)

  • Xiaoxiong Wu

    (School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China)

  • Bo Liu

    (School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China)

Abstract

To explain the effect of tip leakage flow on the performance of an axial-flow transonic compressor, the compressors with different rotor tip clearances were studied numerically. The results show that as the rotor tip clearance increases, the leakage flow intensity is increased, the shock wave position is moved backward, and the interaction between the tip leakage vortex and shock wave is intensified, while that between the boundary layer and shock wave is weakened. Most of all, the stall mechanisms of the compressors with varying rotor tip clearances are different. The clearance leakage flow is the main cause of the rotating stall under large rotor tip clearance. However, the stall form for the compressor with half of the designed tip clearance is caused by the joint action of the rotor tip stall caused by the leakage flow spillage at the blade leading edge and the whole blade span stall caused by the separation of the boundary layer of the rotor and the stator passage. Within the investigated varied range, when the rotor tip clearance size is half of the design, the compressor performance is improved best, and the peak efficiency and stall margin are increased by 0.2% and 3.5%, respectively.

Suggested Citation

  • Botao Zhang & Xiaochen Mao & Xiaoxiong Wu & Bo Liu, 2021. "Effects of Tip Leakage Flow on the Aerodynamic Performance and Stability of an Axial-Flow Transonic Compressor Stage," Energies, MDPI, vol. 14(14), pages 1-19, July.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:14:p:4168-:d:591912
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    References listed on IDEAS

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    1. Xiangyu Su & Xiaodong Ren & Xuesong Li & Chunwei Gu, 2019. "Unsteadiness of Tip Leakage Flow in the Detached-Eddy Simulation on a Transonic Rotor with Vortex Breakdown Phenomenon," Energies, MDPI, vol. 12(5), pages 1-20, March.
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    Cited by:

    1. Xiaoxiong Wu & Bo Liu & Botao Zhang & Xiaochen Mao, 2021. "Effect of Circumferential Single Casing Groove Location on the Flow Stability under Tip-Clearance Effect in a Transonic Axial Flow Compressor Rotor," Energies, MDPI, vol. 14(19), pages 1-20, September.

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