An analytical and experimental study of steam jet pump operating characteristics is described Nozzle throat pressures are related to inlet water temperature and operating pressure by an empirical expression for the case of a steam jet pump with a uniform diameter mixing tube. Test results are presented for operating pressures of 150 and 225 psia with nominally equal pressures for the steam and water flow entering the pump. Comparison of predicted and observed pump heads and flow rates shows relatively good agreement. The analysis employed incorporates a one-dimensional "shock" model in which mixing of the steam and water flows is accomplished by the abrupt collapse of the water annulus into a core of steam. Pressure measurements along the wall of the mixing tube reveal that the mixing process is accompanied by a sudden rise in static pressure similar to that encountered in normal shocks. Transverse probe measurements of static and stagnation pressures in the mixing tube are discussed.
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