二维爆震波胞格结构的数值模拟  

Cellular Structure Simulation of a Two-dimensional Detonation Wave

作　　者：陈灯[1] 何立明[1] 罗俊[1] 郭向阳[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《机械科学与技术》2008年第4期512-514,519,共4页Mechanical Science and Technology for Aerospace Engineering

摘　　要：用时间算子分裂法来分离普通流体流动和化学反应方程,采用加权基本无振荡格式构建了带有复杂状态方程的欧拉方程组;提出一种新的熵修正方法,并结合Roe平均格式来解决激波的不稳定问题。通过对带有详细化学反应的爆震波进行数值模拟,获得了独特规则的胞格结构,描述了胞格的特点及其形成的原因,胞格的长宽比和以往的实验和计算结果基本一致。研究结果表明新的熵修正方法和加权基本无振荡格式可以很好地进行爆震波结构的模拟。Using time operator splitting technique and weighted essentially nonosciUatory （WENO） schemes to simulate detonation with detailed chemical reaction, we obtain its unique and regular detonation wave cellular structure. The time operator splitting technique is employed to decouple hydrodynamic transport and chemical reaction, and WENO scheme is constructed for the homogeneous Euler equations with complex state equations. We also propose a new entropy correction technique to solve the problem of shock instability with Roe scheme. The formation and its causes of the obtained cellular structure have been analyzed. The obtained ratio of cellular width and length is in good agreement with previous numerical and experimental results. The results show that the new entropy correction technique and WENO scheme can simulate the cellular structure of detonation wave successfully.

关 键 词：时间算子分裂法 加权基本无振荡格式 胞格结构 爆震波 胞格 

分 类 号：V411.3[航空宇航科学与技术—航空宇航推进理论与工程]