The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Effect of Turbine Blade tip shape on the Total Pressure Loss of a Turbine Cascade

블레이드 팁 형상이 터빈 캐스케이드 전압 손실에 미치는 영향에 대한 연구

  • 이기선 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 박승덕 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 노영철 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 김학봉 (한국항공대학교 항공우주 및 기계공학과) ;
  • 곽재수 (한국항공대학교 항공우주 및 기계공학과) ;
  • 전용민 (한국항공우주연구원 KHP개발실)
  • Published : 2009.04.01
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Abstract

Leakage flow through turbine blade tip gap causes strong leakage vortex near the blade suction side and induces large aerodynamic losses. In this study, the conventional plane tip and various squealer tip blades were tested in a linear cascade in order to measure the effect of the tip shape on the total pressure loss. Three tip gap clearances of 0.6%, 1.3%, and 2.0% of blade span were tested. Flow measurement was conducted at one chord downstream from the trailing edge with a five-hole probe. Results showed that the leakage vortex was stronger than passage vortex and the mass averaged overall total pressure loss through the cascade was the lowest for suction side blade tip case. For all tested cases, the area averaged overall total pressure loss was increased as the tip clearance increased.

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References

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Cited by

  1. vol.13, pp.1, 2010, https://doi.org/10.5293/KFMA.2010.13.1.063
  2. Comparative Study on the Secondary Flow Measurement in a Turbine Cascade Using 5-hole and 7-hole Probes vol.13, pp.6, 2010, https://doi.org/10.5293/KFMA.2010.13.6.005