以DSD理论和LS方法为基础的程序燃烧法

A program burn method based on detonation shock dynamics and level set (LS) methods

1.
Laboratory for Shock Wave and Detonation Physics Research, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China;
2.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

摘要: 给出了二维弯曲爆轰波后产物流场计算方法。爆轰波阵面传播规律满足Detonation Shock Dynamics (DSD)理论并用level set (LS)方法计算，波阵面传播规律与波后流场的耦合通过程序燃烧法实现，反应进程变量可作为LS函数的函数给出。爆轰波从刚性细管道向粗管道传播产生绕射的二维计算结果表明，化学反应速率不影响波后流场分布，只影响反应区结构。此方法可用于钝感炸药的驱动计算问题。
- 爆炸力学 /
- 程序燃烧法 /
- LS方法 /
- 非理想爆轰
Abstract: Algorithms for the flow field of detonation products behind 2D curved detonation waves are given. Detonation propagation is described by detonation shock dynamics, and detonation front positions are computed by the LS methods. Detonation propagation and coupling between the detonation front and the flow field of detonation products behind the detonation front are calculated by a program burn method, in which the reaction process variable is defined by the LS functions. Calculated results for 2D detonation wave diffraction from a rigid finer tube to a coarser tube show that chemical reaction rates do not influence the flow field distribution behind the detonation front, only affects the reaction zone structure. The proposed method can deal with the driven problems of insensitive explosives.
- mechanics of explosion /
- program burn method /
- LS method /
- non-ideal detonation

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