The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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A Study on the Film-cooling Characteristics of Gas Turbine Blade with Various Area Ratios and Ejection Angles of the Double Jet Holes

이중분사 홀의 면적비와 분사각 변화에 따른 가스터빈 막냉각 특성 연구

  • Cho, Moon-Young (Graduate School of Mechanical Engineering, Sungkyunkwan University) ;
  • Lee, Jong-Chul (School of Mechanical and Automotive Engineering, Gangneung-Wonju National University) ;
  • Kim, Youn-Jea (School of Mechanical Engineering, Sungkyunkwan University)
  • 조문영 (성균관대학교 대학원 기계공학과) ;
  • 이종철 (강릉원주대학교 기계자동차공학부) ;
  • 김윤제 (성균관대학교 기계공학부)
  • Received : 2013.12.05
  • Accepted : 2014.01.10
  • Published : 2014.06.01
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Abstract

The kidney vortex is the important factor adversely influencing film cooling effectiveness. In general, double jet film-cooling hole is designed to overcome the kidney vortex by generating anti-kidney vortices. In this study, the film cooling characteristics and the effectiveness of the double jet film cooling hole were numerically investigated with various area ratios of the first($A_1$) and second($A_2$) cooling hole($A_1/A_2$=0.8, 1.0, 1.25) and lateral ejection angle(${\alpha}$ = $30^{\circ}$, $45^{\circ}$, $60^{\circ}$) as the design parameters. The effects of lateral distance between the first and second row holes are investigated. Numerical study was performed by using ANSYS CFX with the shear stress transport(SST) turbulence model. The film cooling effectiveness and temperature distribution were graphically depicted with various flow and geometrical conditions.

Keywords

References

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