CAJ | 학술논문

为了揭示斜爆轰的胞格结构,基于带化学反应的Euler方程,利用五阶WENO格式,对尖劈诱导的斜爆轰进行了数值模拟,分析了其非定常的波阵面结构.结果表明,斜爆轰波阵面被分为4个区域,依次是斜激波、类ZND结构、单三波点结构和双三波点结构.根据三波点的轨迹绘制了胞格结构,其中单三波点的轨迹为平行直线,而双三波点的轨迹为倾斜的鱼鳞状结构.如移除来流在斜爆轰波切向的分速度,得到斜爆轰法向的胞格结构,其横波间距小于正爆轰胞格的横波间距,这是由于斜爆轰波中横波是爆轰波,而正爆轰波中横波是激波.
위료게시사폭굉적포격결구,기우대화학반응적Euler방정,이용오계WENO격식,대첨벽유도적사폭굉진행료수치모의,분석료기비정상적파진면결구.결과표명,사폭굉파진면피분위4개구역,의차시사격파、류ZND결구、단삼파점결구화쌍삼파점결구.근거삼파점적궤적회제료포격결구,기중단삼파점적궤적위평행직선,이쌍삼파점적궤적위경사적어린상결구.여이제래류재사폭굉파절향적분속도,득도사폭굉법향적포격결구,기횡파간거소우정폭굉포격적횡파간거,저시유우사폭굉파중횡파시폭굉파,이정폭굉파중횡파시격파.
To study cell structure of oblique detonation wave, the phenomenon of wedge-induced oblique detonation wave was simulated numerically based on the reactive Euler equation by using 5-order WENO scheme, and the unsteady wave-front structure was analyzed. The numerical results show that the oblique detonation wave-front structure is divided into four sections：oblique shock, ZND （Zeldovich-von Neumann-Doering）model-like structure, single-headed triple point structure and dual-headed triple point structure. According to the triple point trace,different cell structures were obtained, in which the single-headed triple trace has the characteristics of parallel straight lines, and the dual-headed triple trace is inclining ＂fish scale＂ patterns. While ignoring the velocity component of the incoming flow on the tangent of the oblique detonation wave, the detonation cell symmetry axis is perpendicular to the oblique detonation front, and the width of cell is smaller than that of the normal detonation cell. It is because the transverse wave is the det- onation wave in the former and is the shock wave in the latter.