Design and Experimental Study on Steam Injector with Pressure-Gain

In the steam injector with pressure-gain, the water gains pressure by the power of steam. The outlet water pressure is higher than the inlet steam pressure. The characteristics of pressure-gain makes it possible to use the injector in the nuclear passive safety system. The study on the injector design is rarely reported. This paper presents the method to design the steam injector with pressure-gain. An experimental system was established according to the design. The experimental characteristic curve agrees well with the design curve, which proves the security and reliability of the design.