Abstract:A four-strut supersonic ejector with two-dimensional nozzle configuration was tested in cold flow, the performance of start and load match properties were analyzed. The experiment results indicate that the static pressure of suction chamber in four-strut supersonic ejector is less than 3 kPa and the pressure of ejector inlet chamber in delay status is 15.9% lower than that in start status. In the aspect of load match property, the four-strut ejector with small entrainment ratio and big pressure ratio has a quite obvious advantage. When the entrainment ratio is 0.04, the corresponding pressure ratio is 11.21; when the entrainment ratio is 0.10, the corresponding pressure ratio is 11.21. Therefore, the multi-strut supersonic ejector with two-dimensional nozzle configuration has good performance of start and load match properties, thus possessing considerable potential value in engineering.