摘要
描述了一种应用于湍流反应流场中,用以减少化学反应计算时间的有效方法———当地自适应建表方法,并对之做了改进,使其可以适用于变时间步长环境下的计算流场.应用此方法计算甲烷/空气湍流射流扩散火焰问题,结果显示同直接数值积分方法比较,当地自适应建表方法可以在保证满足计算精度要求的条件下有效的减少化学反应计算时间.
An efficient technique used to reduce the computational time required to treat detailed chemistry in turbulent reactive flows is derived. The technique is based on the in situ adaptive tabulation method and has been improved to allow variable time interval in computational fluid. Test Calculation is performed for a turbulent jet diffusion flame, and the results show that the improved method can achieve a reasonable speed-up factor compared to the direct numerical integration of the reaction equations with effective control of interpolation error.
基金
国家"973"(G1999022207)资助项目.
关键词
当地自适应建表
湍流反应流场
化学热力学状态
in situ adaptive tabulation
turbulent reactive flows, thermochemical state
