In order to study the turbulent lubrication characteristics of radial sliding bearings considering viscosity temperature effect,a simulation analysis model for turbulent lubrication of high-speed,high-power and heavy-duty journal bearings considering viscosity temperature effect was established based on FLUENT two-phase flow model,taking a turbo-generator radial sliding bearing as the research object.A three-dimensional oil film model was established with the Creo software and imported into ICEM software to divide the structured grid.The viscosity properties of the lubricating oil were defined by the UDF program of the viscosity-temperature equation.Based on the established FULENT model,the effects of eccentricity and Reynolds number on bearing turbulent lubrication characteristics under constant and variable viscosity conditions were studied,and the simulation results were compared with the those of the widely used Ng-Pan turbulent lubrication theory to verify the correctness of the simulation results.The results show that after considering the viscosity-temperature effect,the maximum oil film pressure and maximum oil film temperature of the bearing are significantly reduced,the bearing capacity and friction force are reduced,and the friction coefficient and end discharge flow rate are increased.