A fast thermoelastohydrodynamic model for dynamically loaded journal bearings behaviour analysis
Keywords:
thermoelastohydrodynamic lubrication, Reynolds equation, finite element, bearing, connecting rodAbstract
An efficient method for thermoelastohydrodynamic (TEHD) journal bearings lubrication analysis is presented. Lubrication film temperature is treated as a time-dependent two-dimensional variable and is averaged over the film thickness. In order to compute the film and solids temperature, a new heat flux conservation algorithm, based on both Finite Element (FEM) – Finite Volume (FVM) methods, is proposed. A key point in this analysis is the consideration of different heat transfer coefficients at film – solids and solids – surroundings boundaries. The Reynolds equation in the film is solved using the FEM discretization. A mass-conserving cavitation algorithm is applied and the effect of viscosity variation with the temperature is taken into account.
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References
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