计算力学学报2016，Vol.33Issue(4)：576-581,6.DOI:10.7511/jslx201604024
不稳定性对爆轰波楔面马赫反射的影响规律研究
The effect of the stability on the Mach reflection of detonations on a wedge
摘要
Abstract
The Mach reflection process of cellular detonations on a wedge is numerically studied with a two-step chemical reaction model in an attempt to elucidate the effect of the stability on the development and self-similarity on the Mach reflection.Considering the stiffness of the reactive source term,an addi-tive Runge-Kutta method is also used to couple the stiff reactive source term and the non-stiff convection which is discretised with a fifth-order WENO scheme.The numerical results suggest that the Mach reflection of a regular cellular detonation is in accordance with that of a ZND detonation.The self-simi-larity is lost due to the presence of the characteristic length and the cellular structures only result in the local fluctuations of the triple-point traj ectory.In the near field,the Mach reflection process is self-similar due to the high overdrive.In the far field,the Mach reflection can lead to self-similarity asymptotically.For unstable detonations,the stability of the detonation front is comparable with the Mach stem.Thus locating the boundary of the Mach reflection becomes difficult and it may not be meaningful to carry out a self-similar analysis.关键词
爆轰波/马赫反射/自相似性/稳定性/特征尺度Key words
cellular detonation/Mach reflection/self-similarity/stability/characteristic length分类
数理科学引用本文复制引用
宁建国,李健..不稳定性对爆轰波楔面马赫反射的影响规律研究[J].计算力学学报,2016,33(4):576-581,6.基金项目
国家自然科学基金(11390363 （）
11325209) （）
北京理工大学青年教师学术启动计划资助项目 （）
