高马赫数高压力的氧碘化学激光器阵列喷管的数值模拟

 采用计算流体力学方法，研究了以氮气为载气的新型高总压氧碘化学激光器(COIL)阵列喷管。模拟结果表明:采用高马赫数的氮气流引射低马赫数的氧气流，可以提高光腔出口的驻点压力；高超声速的氮气与声速的氧气混合较慢，在喷管出口安装翼片有利于增强气流混合；喷管出口安装大翼片，翼片诱导的横向涡可以到达氮喷管的中心，光腔内混合比较充分。通过采用10组分21反应的化学反应模型，模拟了阵列喷管内多组分气体的混合和化学反应过程。模拟结果表明：光腔内生成了激发态碘原子和基态碘原子，光腔中获得了正增益，而且光腔出口的总压也由2.6 kPa提升至28.9 kPa。

Numerical simulation of high Mach number high pressure COIL nozzle array

Using computational fluid dynamic methods,this paper simulated nozzle array with high energy N2 as carrier gas.The results indicate that using high mach number N2 to eject low Mach number O2,the stagnation pressure at cavity exit can be enhanced.The process of mixing hypersonic N2 with sonic O2 is very slow,installing mixing tabs at nozzle exit can enhance the mixing.Installing coarse tabs can get relatively uniform flowfield.Through chemical reaction with 10 species and 21 reactions,the paper simulated the...