有、无障碍物爆震管起爆过程的CE/SE模拟
Numerical simulation of ignition in detonation tube with/without obstacles by CE/SE
-
摘要: 用时空守恒元和解元(CE/SE)法模拟有无障碍物情况下爆震管二维爆震波的形成和传播过程,分析爆震波的不同机理,研究在较低能量下,点火区温度、爆震管管径以及障碍物对爆燃-爆震转捩过程(DDT)的影响.控制方程采取无量纲形式,用拓展的隐式梯形法实现刚性源项积分.研究表明,点火能量与点火压力相关,在较低的点火能量下,可以通过提高点火温度、减小爆震管径及加入障碍物加强爆震过程,减小爆燃-爆震转捩过程DDT时间和距离.为研究爆震波点火和DDT过程提供了理论依据.
-
关键词:
- 时空守恒元和解元方法(CE/SE) /
- 爆震波 /
- 点火 /
- 爆燃-爆震转捩过程(DDT) /
- 障碍物
Abstract: A space-time conservation element and solution element method(CE/SE) was used to simulate the formation and propagation process of two-dimensional detonation with/without obstacles.The detonation mechanisms were analyzed.Influential factors to deflagration to detonation transition(DDT)were evaluated,including the ignition temperature,the tube diameter and the obstacles.Model equation was non-dimensionalized,and the implicit trapezoidal technique was established to handle stiff source term.Results show that the ignition energy is related to the ignition pressure.The higher ignition temperature,the smaller tube diameter or setting obstacles could accelerate DDT process under the condition of small ignition energy.The results offer a reference to study detonation ignition and DDT process. -
点击查看大图
计量
- 文章访问数: 1426
- HTML浏览量: 5
- PDF量: 442
- 被引次数: 0
下载: