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Analysis of Impact of a Novel Combined Casing Treatment on Flow Characteristics and Performance of a Transonic Compressor

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  • Jia-Xuan Liu

    (School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China)

  • Fu-Sheng Yang

    (School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China)

  • Tian-Qing Huo

    (School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China)

  • Jian-Qiang Deng

    (School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China)

  • Zao-Xiao Zhang

    (School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

To reduce the negative impacts of stall and surge on compressor performance, a novel combined casing treatment (CCT) structure with axial skewed slots and injection groove is proposed in this paper. The aerodynamic performance, as well as the mechanisms of loss generation, of a transonic axial compressor with NASA Rotor 67 are investigated numerically. The simulation results indicate that, compared with individual casing treatment method, the CCT works effectively with regard to operation performance. The stall margin (SM) is increased by 14.7% with 1.12% decrease in the peak efficiency. The interaction of axial skewed slots and injection groove can be explained by the enhancement of exchange flow in slots and axial motion of fluid. As a result, the leakage flow near the blade tip is eliminated and the flow separation is further suppressed. What is more, an analysis of entropy generation is also conducted. The results reveal that the effect of CCT on loss reduction mainly concentrates in the tip part of the blade, with the loss decrease about 14.46% compared with the original rotor. The best control effect can be expected by appropriate match between geometrical parameters of axial skewed slots and mass flow rate of injection from the parameter analysis.

Suggested Citation

  • Jia-Xuan Liu & Fu-Sheng Yang & Tian-Qing Huo & Jian-Qiang Deng & Zao-Xiao Zhang, 2022. "Analysis of Impact of a Novel Combined Casing Treatment on Flow Characteristics and Performance of a Transonic Compressor," Energies, MDPI, vol. 15(14), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:14:p:5066-:d:860496
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    References listed on IDEAS

    as
    1. Benini, Ernesto & Biollo, Roberto & Ponza, Rita, 2011. "Efficiency enhancement in transonic compressor rotor blades using synthetic jets: A numerical investigation," Applied Energy, Elsevier, vol. 88(3), pages 953-962, March.
    2. Carlo Cravero & Philippe Joe Leutcha & Davide Marsano, 2022. "Simulation and Modeling of Ported Shroud Effects on Radial Compressor Stage Stability Limits," Energies, MDPI, vol. 15(7), pages 1-20, April.
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    Cited by:

    1. Ruoyu Wang & Xianjun Yu & Baojie Liu & Guangfeng An, 2022. "Effects of Loading Level on the Variation of Flow Losses in Subsonic Axial Compressors," Energies, MDPI, vol. 15(17), pages 1-21, August.

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