摘要
应用基元反应模型和频散可控耗散格式(DCD)对氢氧爆轰波在楔面反射进行了数值模拟,计算中氢氧混合物的化学反应采用了8种组分20个反应方程式,在处理化学反应引起的刚性问题时采用了时间算子分裂的方法,模拟了爆轰波在楔面反射由马赫反射向规则反射转变的过程,得到了反射转变临界角,同时考虑了初始压力和组分的影响,并和实验及理论分析结果进行了比较,结果是令人满意的。
In this paper, the chemically reacting flow-field of detonation reflection over wedges was simulated numerically. The dispersion-controlled dissipative scheme (DCD) was adopted to solve two-dimensional Euler equations implemented with detailed chemical reaction kinetics of hydrogen-oxygen-argon mixture. The fractional step method was applied to treat the stiff problem arising from computation of chemical reaction flow. The wedge angle, initial pressure and composition of the mixture were taken into consideration respectively to evaluate their effect on the angle X of triple-point trajectory of detonation reflection over wedges. From the numerical results it is observed that the critical wedge angle α_(crit) for the transition from Mach reflection to regular reflection of detonation wave is close to the experimental data or CCW theoretical result. The numerical results also show that the angle X of triple-point trajectory is mainly depend on wedge angle a and is not sensitive to variation of the initial pressure Po.
出处
《力学学报》
EI
CSCD
北大核心
2004年第4期385-392,共8页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金(10276035)
中国工程物理研究院联合资助项目~~
