Numerical analysis on dynamic characteristics of cryogenic hydrostatic journal bearing

Dynamic characteristics of a two row staggered recess cryogenic hydrostatic journal bearing used in the liquid hydrogen turbopump of rocket engines fo r space transport systems are numerically analyzed. Effects of the rotation al speed and the shaft eccentricity are studied in the analysis. Their effe cts on the stiffness and damping coefficients and the whirl frequency ratio are clarified. Moreover, effects of the orifice parameter, the distance be tween two recess rows, and the number of recesses on these dynamic characte ristics are investigated.