상온 가스를 이용한 이젝터의 유량비에 따른 성능에 관한 연구

Performance characteristics and wall pressure of an ejector to simulate various high altitude environments were investigated according to supply pressure of primary flow and entrainment ratio(secondary flow/primary flow). The result showed that the maximum degree of a vacuum was changed by primary flow pressure and it was not changed over a limited pressure. Also, the inside pressure of ejector was increased by entrainment ratio independent of primary flow supplying pressure. When the entrainment ratio is over 0.8 for primary flow supplying pressure of 30bar, it is impossible to simulate high altitude environment.