【作者】 陈霄； 董刚；

【Author】 Chen Xiao;Dong Gang;Key Laboratory of Transient Physics,Nanjing University of Science and Technology;

【机构】 南京理工大学瞬态物理重点实验室；

【摘要】 激波与反应性界面相互作用在自然界与工程实际中普遍存在。已有的对该现象数值研究由于受计算条件的限制,主要采用二维的数值模拟开展研究,对界面的刻画不够准确,测量的参数也与实际有所差距。为更加精确捕捉激波与反应性界面的相互作用过程,本文采用了9阶WENO的高精度数值格式和单步化学反应,对激波及其反射激波与预混火焰界面的相互作用过程进行了三维数值模拟。考察了三种不同Ma数下的初始入射激波与预混火焰界面的相互作用过程并且给出混合区平均涡量随时间变化的规律。提出了无量纲时间的概念,将激波与火焰界面作用过程标准化。本文采用傅里叶变换,对激波诱导的火焰界面的混合区进行了谱分析,发现混合区内的动能谱符合-5/3特性。更多还原

【Abstract】 The interaction between the shock wave and flame interface widespread existed in nature and practical engineering.Due to the limit of the computational condition,previous investigation of the phenomenon mainly adopts two-dimensional numerical simulation.For accurately capturing the interaction process between the shock wave and flame interface,a high-resolution 9 th-order WENO（weighted essentially non-oscillatory） scheme and single-step chemical reaction is utilized to 3 D numerical simulated the interaction process between the shock wave and premixed flame interface.The article investigates the interaction between the three different strong initial shock waves（Ma=1.2,1.7,2.2） and gives the time history of mean vorticity.The dimensionless time is presented and the interaction processes between the different strong shock waves and flame interface are standardized The article adopt Fourier transform to investigate the flame interface induced by shock wave.it is found that the kinetic energy spectra in mixing zone meets the k^-5/3 character.更多还原