Abstract
Experimental study of an oil ejector pump which has high tolerable backing pressure (110 mm of mercury) is described. The linear relation between a critical backing pressure and a quantity of oil vapor passing through a nozzle to a diffuser is obtained.
“Double critical backing pressure” and “Double throughput” phenomena for higher air discharge is discussed. Maximum throughput appears near a “equivalent pressure” which is intake air pressure equal to vapor jet pressure at nozzle outlet. And the pumping speed per unit area of annular clearance between the nozzle outlet and diffuser is about constant at this “equivalent pressure” in our results.
