Experimental studies of design options for injector pump/condenser within booster turbopump assembly for liquid oxygen delivery

The paper provides results of developmental tests of an injector pump/condenser within a booster turbopump assembly for liquid oxygen delivery, which is being developed for a liquid-propellant engine. The injector pump/condenser is designed for mixing the exhaust gas of the booster turbopump assembly turbine with the main stream of liquid oxygen, thus reducing the loss of propellant during engine operation. The paper provides results of experimental studies of various design options for the injector pump/condenser operating using its nominal propellant component (oxygen), the studies during which measurements were taken of the pressure, as well as of the frequency and amplitude of pressure oscillations in the line both up- and downstream of the pump/condenser. Based on the results of the studies, the best design for the injector/pump was selected.