Supercritical carbon dioxide (SCO2) is widely used and studied in all over the world as a working fluid for thermodynamic cycles due to its excellent physical properties. In this paper, an elastic tilting pad journal bearing using SCO2 as lubricating medium is designed. Based on the Navier-stokes equation and continuity equation, the theoretical model of SCO2 hydrodynamic lubrication bearing considering turbulence effect is established by combining the nonlinear SCO2 density and viscosity expressions, and the numerical method of SCO2 hydrodynamic lubrication is proposed. The static and dynamic characteristics of SCO2 lubricated tilting pad journal bearings are studied.
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