On Rayleigh-Plesset based cavitation modelling of fluid film bearings using the Reynolds equation

9th International Symposium on Cavitation

Snyder, Troy A.^1 ; Braun, Minel J.^1 ; Pierson, Kristopher^1

Department of Mechanical Engineering, University of Akron, Akron

OH

44325, United States^1

关键词: Cavitation model;    Fluid film bearings;    Non-homogeneous;    Time dependent;    Transient environment;    Transient solutions;    Two phase fluid;    Working fluid;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012072/pdf
DOI  :  10.1088/1742-6596/656/1/012072

来源: IOP

【 摘 要 】

In the 'universe' of the general cavitation phenomena the issue of cavitation in bearings, due to its particular application and the mostly non-homogeneous working fluids associated with it, has presented a rather specialized challenge. The present paper models the phenomenon of pseudo-cavitation in fluid film bearings and offers a physics-based approach that conserves mass while solving the Reynolds (RE) and Rayleigh-Plesset (RP) equations in a coupled, fully transient environment. The RP solution calculates a time dependent void fraction synchronized with the RE transient solution, where density and viscosity are (re)calculated at every grid point of this homogeneous two-phase fluid. The growth and evolution of the cavitation zone expanse is physics-based and thus can accommodate evaporation, diffusion, or pseudocavitation as separate processes. This is a step beyond the present available cavitation models both for the RE and the Navier-Stokes equations.