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Numerical Study on Vortex Structures and Loss Characteristics in a Transonic Turbine with Various Squealer Tips

Author

Listed:
  • Yufan Wang

    (National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics, School of Energy & Power Engineering, Beihang University, Beijing 100191, China)

  • Weihao Zhang

    (National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics, School of Energy & Power Engineering, Beihang University, Beijing 100191, China)

  • Dongming Huang

    (National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics, School of Energy & Power Engineering, Beihang University, Beijing 100191, China)

  • Shoumin Jiang

    (AECC Shenyang Engine Research Institute, Shenyang 110015, China)

  • Yun Chen

    (AECC Shenyang Engine Research Institute, Shenyang 110015, China)

Abstract

Cavity width and height are two key geometric parameters of squealer tips, which could affect the control effect of squealer tips on tip leakage flow (TLF) of gas turbines. To explore the optimal values and the control mechanisms of cavity width and height, various cases with different cavity widths and heights are investigated by solving the steady Reynolds Averaged Navier–Stokes (RANS) equations. In this study, the range of cavity width is 9.2–15.1 τ , and that of cavity height is 1.0–3.5 τ . The results show that the optimal value of cavity height is 2.5–3.0 τ , and that of cavity width is about 10.0–10.5 τ . The small cavity width could restrain the breakdown of tip leakage vortex (TLV) and reduce the extra mixing loss. Both small cavity width and large cavity height could enhance the blocking effect on the TLF, reducing the corresponding mixing loss. However, both of them will inhibit the length of the scraping vortex (SV), which is bad for the control of loss. In addition, large cavity height could reduce the loss inside the clearance, while small cavity width could not. This work could provide a reference for the design of squealer tip.

Suggested Citation

  • Yufan Wang & Weihao Zhang & Dongming Huang & Shoumin Jiang & Yun Chen, 2022. "Numerical Study on Vortex Structures and Loss Characteristics in a Transonic Turbine with Various Squealer Tips," Energies, MDPI, vol. 15(3), pages 1-18, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:1018-:d:738037
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