Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Study on Bearing Performance Involving the Mixture of Water within Engine Oil in a Turbocharger Journal Bearing

터보챠저 저어널 베어링에서 물과 윤활유가 혼합될 때 베어링 성능에 관한 연구

  • 전상명 (호서대학교 자동차공학과)
  • Received : 2011.04.25
  • Accepted : 2011.06.15
  • Published : 2011.08.31
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Abstract

In this study, using the governing equations for thermohydrodyamic lubrication involving the homogeneous mixture of incompressible fluid derived by based on the principle of continuum mechanics, it is discussed the effects of water dispersed within engine oil on the performance of high speed journal bearing of a turbocharger. The governing equations are the general equations being able to be applied on the mixture of Newtonian fluid and non-Newtonian fluid. Here, the fluid viscosity index, n of power-law non-Newtonian fluid is supposed to be 1 for the application of the journal bearing on a turbocharger lubricated with the mixture of two Newtonian fluids, water dispersed within engine oil. The results related with the bearing performance are showed that the friction force and bearing load capacity decrease as increasing the volume percent of water.

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References

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