Abstract
A bulk-flow thermohydrodynamic (THD) analysis for prediction of the static and dynamic performance characteristics of turbulent-flow, process-liquid hydrostatic journal bearings (HJBs) is presented. The film-averaged momentum transport and energy equations replace the lubrication Reynolds equation, and fluid inertia on film lands and at recess edges are preserved in the analysis. Flow turbulence is accounted through turbulence shear parameters based on friction factors derived from Moody's formulae. Numerical predictions are compared successfully to experimental results from a five-recess, turbulent-flow, water-lubricated hydrostatic bearing operating at a high rotational speed. HJBs operating in a hydrob mode (i.e. with journal rotation) provide no better stability characteristics than hydrodynamic journal bearings and are likely to show half-speed whirl.
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