ANALYSIS OF A HYDROSTATIC JOURNAL BEARING LUBRICATED BY CONDENSING STEAM.
MECHANICAL TECHNOLOGY INC LATHAM N Y
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The report presents an analytical investigation of the externally-pressurized, steam-lubricated journal bearing. In the case under consideration, the supply steam is saturated or slightly superheated and the bearing temperature is lower about 20F than that of the supply steam. Two models are used in the analysis 1 Steam condenses completely into water at the bearing film inlet and reevaporates somewhere before the exit. 2 After entering the film, steam becomes a two-phase mixture, but it remains to be a homogeneous fluid. The wet steam becomes dry again before the exit. It is shown that the steam bearing does not deviate much from a gas bearing. An analysis is performed and solutions are obtained by perturbation calculation based on the eccentricity ratio. Numerical calculations were programmed on the IBM 1620 computer. The static load-carrying capacity in the normal operating range of a dry steam gas bearing is shown to be considerably reduced due to condensation. Author