The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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CFD Analysis of Leakage Prediction for Brush Element

CFD를 활용한 브러쉬 요소의 누설유량 예측 해석

  • Kim, Kyul (department of mechanical engineering, graduate school, Gachon University) ;
  • Ha, Tae Woong (department of mechanical engineering, Gachon University)
  • 김결 (가천대학교 대학원 기계공학과) ;
  • 하태웅 (가천대학교 기계공학과)
  • Received : 2016.12.22
  • Accepted : 2017.02.12
  • Published : 2017.04.01
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Abstract

The accurate prediction of leakage flow through the brush element of brush seal at the steam turbine is important to find optimum design parameters for increasing an efficiency. In this study, CFD analysis method using commercial software FLUENT is proposed to predict leakage through the brush element. Since the brush element has a complex three-dimensional shape with many bristle assemblies, it is difficult to analyze the flow field. Therefore, if the brush element is assumed to be porous medium region, the analysis time can be shortened. Two determination methods of resistance coefficients of the Darcian porous medium equation are suggested. By comparing the 2D and 3D CFD analysis results for the leakage of the brush element using the two resistance coefficient determination methods, the effectiveness of the analysis for the porous medium assumption is proved.

Keywords

References

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