대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제26권11호
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  • Pages.1552-1558
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  • 2002
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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블레이드 앞전 3차원 형상 변형에 의한 터빈 캐스케이드 내의 이차유동 제어

Secondary flow Control in the Turbine Cascade with the Three-Dimensional Modification of Blade Leading Edge

  • 김정래 (고려대학교 대학원 기계공학과) ;
  • 문영준 (고려대학교 기계공학과) ;
  • 정진택 (고려대학교 기계공학과)
  • 발행 : 2002.11.01
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초록

The blade leading edge is modified to control the secondary flow generated in the turbine cascade with fence by intensifying the suction side branch of the horseshoe vortex. The incompressible Navier-Stokes equations are numerically solved with a high Reynolds number k-$\varepsilon$ turbulence closure model for investigating the vortical flows in the turbine cascade. The computational results of total pressure loss coefficients in the wake region are first compared with experiments for validation. The structure and strength of the passage vortex near the suction surface are examined by testing various geometrical parameters of the turbine blade leading edge.

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참고문헌

  1. Koh, Sung Ryong and Moon, Young J., 1997, 'Computational Analysis of Turbulent Flows in the Turbine Cascade with Fence,' Proceedings (B) of KSME Fall Meeting, pp. 582-589
  2. Moon, Y. J., and Koh, S. R., 2001, 'Counter-Rotating Streamwise Vortex Formation in the Turbine Cascade with Endwall Fence,' Computers & Fluids, Vol. 30, pp. 473-490 https://doi.org/10.1016/S0045-7930(00)00026-8
  3. Chung, J. T., 1992, 'Flow and Heat Transfer Experiments in the Turbine Airfoil/Endwall Region,' Ph.D. Thesis Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN
  4. Kawai, T., Adachi, T., and Shinoki, S., 1989, 'Secondary Flow Control and Loss Reduction in a Turbine Cascade Using Endwall Fences,' JSME International Journal, Series Ⅱ, Vol. 32, no. 3, pp. 375-387
  5. Kawai, T., Adachi, T., and Shinoki, S., 1990, 'Visualization Study of Three Dimensional Flow in a Turbine Cascade Endwall Region,' JSME International Journal, Series Ⅱ, Vol. 33, No. 2, pp. 256-264
  6. Sauer, H., and Wolf, H., 1997, 'Influencing the Secondary Flow in Turbine Cascades by the Modification of the Blade Leading Edge,' 2nd European Conference on Turbomachinery, Antwerpen
  7. Sauer, H., Muller, R., and Vogeler, K., 2001, 'Reduction of Secondary Flow Losses in Turbine Cascades by Leading Edge Modifications at the Endwall,' Transactions of the ASME, Journal of Turbomachinery, Vol. 123, pp. 207-213 https://doi.org/10.1115/1.1354142AdditionalInformation
  8. Lee, Y. J., 1997, ',Experimental Study on Effects of the Boundary Layer Fence on the Three-dimensional Flow in Gas Turbines,' M.S. Thesis, Korea University, Seoul, Korea