爆轰波平掠惰性气体界面及其解耦现象的数值研究

Numerical investigation of detonation sweeping an interface of inert gas and its decoupling

摘要: 采用基元化学反应模型和迎风TVD格式，数值研究了爆轰波平掠惰性气体界面时的物理现象及其作用机制，并用点隐方法克服化学反应源项引起的计算刚性。数值结果显示，当爆轰波平掠过惰性气体界面时，形成了爆轰波、界面、透射激波以及稀疏波相互作用的现象。在高N2比例稀释的可燃混合气体情况下，当爆轰波平掠过特定惰性气体界面时，它与惰性气体界面相互作用产生的稀疏波可以导致爆轰波的解耦。
- 爆炸力学 /
- 爆轰现象 /
- 基元化学反应模型 /
- 惰性气体
Abstract: Numerical investigations were carried out to study the phenomena of detonation sweeping a contact surface of inert gas and its decoupling. The control-equations were solved with upwind TVD algorithm and elemental chemical reaction model, with the point-implicit used to overcome the numerical stiffness of chemical reaction source term. The results show that, when detonation sweeps a contact surface of inert gas, interactions of detonation, transmit shock and contact surface take place; in condition of high N2 dilution proportion, detonation is decoupled by rarefaction waves.
- mechanics of explosion /
- detonation phenomena /
- elemental reaction model /
- inert gas

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