Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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A Study on Performance Analysis of Cryogenic Hydrostatic Journal Bearings : the Effects of Turbulent Flow, Pressure Drop and Variable Liquid Properties

극저온 정압 저널베어링의 성능해석에 관한 연구 : 난류유동, 압력강하, 가변 밀도 및 점도의 영향

  • 김성기 (한국과학기술원 기계공학과) ;
  • 강지훈 (한국과학기술원 기계공학과) ;
  • 김경웅 (한국과학기술원 기계공학과)
  • Published : 2003.06.01
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Abstract

In this paper, static characteristics of a cryogenic hydrostatic journal bearing which has 2-rows staggered recesses are numerically analyzed. The regime of operation of this bearing is fully turbulent with large fluid inertia effects. The turbulent lubrication equation is solved under the assumption that turbulence parameters are decided by the Reynolds numbers. Pressure drop caused by inertia effect at the recess edge is considered in this analysis. Also density and viscosity of working fluid are considered as function of only pressure. Numerical results for a cryogenic Hydrostatic journal bearing show pressure distribution, load capacity, flow rate, and recess pressure. The effects of turbulent flow, pressure drop and variable liquid properties are discussed.

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References

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