HIGH PRESSURE EJECTOR TEST

A commercial jet ejector was operated over a range of pressures up to 1500 psi to determine its characteristics. The purpose of the test was to establish head-capacity and efficiency curves to serve as a guide in sizing much larger lets for high pressure applications. Presumably, larger jets would have similar characteristics except for flow rate. Water, circulated by a canned- rotor pump, was the motive fluid; the driven fluid was N gas. All tests were run at room temperature. Both gas head and efficiency varied directly with systcm pressure up to 1000 psi and dropped slightly at 1500 psi. The optimum operating point was not reached, but efficiencies ot approximately 25% were attained at 1000 to 1500 psi. The ejector appears attractive as a simple and efficient device for pumping gas at high pressure. (auth