CAJ | 학술논문

为了研究液体燃料连续旋转爆轰发动机( Continuous Rotating Detonation Engine,CRDE)中爆轰波形成与传播过程,采用二维CE/SE方法,对汽油、富氧空气两相连续旋转爆轰发动机爆轰过程进行数值模拟,分析了连续旋转爆轰发动机气液两相爆轰流场和爆轰波结构及入口和出口处的流场变化规律,揭示了CRDE自持传播机理. 计算结果表明,燃料以时段阶梯填充方式来起爆旋转爆轰,可快速有效地形成单方向稳定传播的爆轰波;在周向方向上出口处的流场间断面要延后于入口处的间断面,出口流场间断面主要是由斜激波和接触间断面造成的,而入口流场间断面是由爆轰波引起的. 通过对气液两相CRDE的二维数值模拟,可更好地了解液体燃料CRDE的工作过程,为液体燃料CRDE研究提供指导.
위료연구액체연료련속선전폭굉발동궤( Continuous Rotating Detonation Engine,CRDE)중폭굉파형성여전파과정,채용이유CE/SE방법,대기유、부양공기량상련속선전폭굉발동궤폭굉과정진행수치모의,분석료련속선전폭굉발동궤기액량상폭굉류장화폭굉파결구급입구화출구처적류장변화규률,게시료CRDE자지전파궤리. 계산결과표명,연료이시단계제전충방식래기폭선전폭굉,가쾌속유효지형성단방향은정전파적폭굉파;재주향방향상출구처적류장간단면요연후우입구처적간단면,출구류장간단면주요시유사격파화접촉간단면조성적,이입구류장간단면시유폭굉파인기적. 통과대기액량상CRDE적이유수치모의,가경호지료해액체연료CRDE적공작과정,위액체연료CRDE연구제공지도.
In order to discuss the formation and propagation of detonation wave of the liquid fuel continuous rotating detonation engine( CRDE) ,the two-dimensional CE/SE method is used to simulate the detonation process of gasoline and oxygen-enriched air two-phase CRDE.The gas-liquid two-phase detonation flow field of CRDE,the structure of detonation wave,and the variation of flow field at inlet and exit were analyzed,then the self-sustaining mechanism of CRDE was revealed.The results show that rotating detona-tion is initiated by the method of multistep filling fuel,forming a stable detonation wave along one direction propagation rapidly and effectively.In circumferential direction,the discontinuity of exit flow field appears behind the discontinuity of inlet. Oblique shock wave and contact discontinuity are the main reasons of the formation of discontinuity in the exit flow field, while the discontinuity of inlet flow field is caused by detonation wave.The two-dimensional numerical simulation of gas-liquid two-phase CRDE gives us better understanding of the liquid fuel CRDE and provides guidance for the research of liquid fuel CRDE.