摘要
对一种模拟化学非平衡流动的时间和空间二阶精度新型解耦算法进行两方面改进,流动算子采用基于Runge-Kutta方法的时间格式以后,可以推广到更多的空间差分格式,化学反应源项求解算子可以采用梯形公式、拟稳态逼近法和变系数常微分方程求解器.对H_2/Air预混气体中激波诱导振荡燃烧的Lehr试验进行模拟,考察了化学动力学模型、网格尺寸和差分格式耗散大小对计算结果的影响,同时对不同的化学反应源项算子求解算法的计算效率进行了比较.
This paper improved an uncoupled simulating method of chemical non-equilibrium flow.The flow operator can be numerically solved by Runge-Kutta method;the reaction operator can be solved by trapezoidal rule,quasi steady state approximation and VODE.The oscillating shock-induced combustion experiments conducted by Lehr were numerically studied in the paper.The impact factors,such as the computing grid,the reaction mechanism and the diffusion of numerical scheme were studied in the simulation.The numerical results compared well with those of the experiments to show that the extension of this improved uncoupled method was successful.
出处
《力学学报》
EI
CSCD
北大核心
2010年第3期572-578,共7页
Chinese Journal of Theoretical and Applied Mechanics
关键词
化学非平衡流动
解耦算法
计算方法
chemical non-equilibrium flow
uncoupled method
numerical method
