축소형 이젝터의 시동 특성에 대한 수치적 연구

A numerical study has been conducted to investigate starting characteristics of sub-scale ejector with respect to ejector operation pressure. In case of 20 bar, ejector chamber pressure decreased under steady state of ejector chamber pressure and then pressure recovered and fluctuated. But ejector chamber pressure continuously decreased to steady state in case of 30 bar. In case that ejector is not filled with supersonic flow, it takes a long time to reach steady state because of pressure fluctuation.