CAJ | 학술논문

搭建了二维超-超引射器实验系统，进行了二次喉道型式引射器启动特性和负载特性实验，获得了引射器混合室内流场纹影图，结果表明：超声速引射器临界启动状态下，混合室内存在反压引起的激波系；引射器完全启动状态下，主激波系可始于混合室后段，无需被完全吞入二次喉道内；二次流对引射器启动有助推效果，可使混合室内激波系后移；一次流对二次流有压缩作用，且一次流工作压力越高，压缩作用越强；一次流、二次流之间会形成明显的混合层，当一次流、二次流静压不匹配时，一次流喷管出口内端壁处将形成较强斜激波，其在固壁与混合层之间反射、交叉，并向下游延伸，会降低一次流引射性能。
탑건료이유초-초인사기실험계통，진행료이차후도형식인사기계동특성화부재특성실험，획득료인사기혼합실내류장문영도，결과표명：초성속인사기림계계동상태하，혼합실내존재반압인기적격파계；인사기완전계동상태하，주격파계가시우혼합실후단，무수피완전탄입이차후도내；이차류대인사기계동유조추효과，가사혼합실내격파계후이；일차류대이차류유압축작용，차일차류공작압력월고，압축작용월강；일차류、이차류지간회형성명현적혼합층，당일차류、이차류정압불필배시，일차류분관출구내단벽처장형성교강사격파，기재고벽여혼합층지간반사、교차，병향하유연신，회강저일차류인사성능。
The test facility of 2-D supersonic-supersonic ej ector was constructed.Varieties of tests were carried out to inves-tigate the starting and load characteristics of a second throat ej ector.The schlieren photographs of the mixing chamber flow field were got by schlieren apparatus synchronously.The experimental results show that there are shocks brought by background pres-sure in mixing chamber fore part while the ej ector starts critically.It is possible that the main shocks originate from the mixing chamber rearward while the ej ector starts completely.Secondary flow has booster action for ej ector starting which can make shocks to move backward in evidence.As the secondary flow is inj ected,the mixing layer between primary and secondary flow will occur obviously.If the pressures of primary and secondary flow are not matched,a strong oblique shock wave will be formed at nozzle exit inwall,which will be reflected between the wall and mixing layer,then the capability of primary flow will be re-duced.