The discrepancies evolved from the neglect of non-equilibrium aspects of the flow.
A critical review of the models showed serious discrepancies between the analytical models and the experimental observations. However, the design of these injectors from the viewpoint of a basic understanding of heat and mass transfer processes has not been well developed.
A detailed survey has indicated that various injector designs are available for operating pressures below 250 psig. Thus, the injector is particularly suited for emergency core cooling operations. The injector has no moving parts and requires no external power supply nor any complex control system. An injector is a particular type of jet pump which uses condensable vapor to entrain a liquid and discharge against a pressure higher than either motive or suction pressures.
