Experimental investigation on performance of multi-nozzle supersonic ejector with secondary flow

An ejector test facility was established to investigate the performance of a multi-nozzle supersonic ejector with a secondary flow. Using the hot rocket exhaust gases as primary and simulated secondary driving fluids, wall static pressure distributions on the ejector were obtained. Emphases were laid on the reliability of the multi-nozzle ejector and the influence of the primary flow total pressure and nozzle assembling configurations on the performance of the ejector. Experimental results show that the pumping requirement of the simulated secondary flow can be satisfied by using the multi-nozzle supersonic ejector. With the secondary flow joined, the pressure losses can be reduced greatly, which almost corresponds to 15 percents of the primary flow total energy. The lower primary flow tot