化学激光器燃烧室中的爆轰问题分析

Analysis of Detonation in Chemical Laser Combustor

为评估化学激光器燃烧室中爆轰的影响,分析了氟化氘(DF)化学激光器在某次出光实验中燃烧室产生的爆轰问题,采用时空守恒元与求解元(CE/SE)方法对该爆轰过程进行了数值模拟。结果表明,燃烧室中爆轰的产生与传播使得燃烧室瞬态压力剧增,由此产生的振动、冲击和扭矩作用导致光学谐振腔失调,从而影响了激光器的正常出光。研究结果对DF激光器的优化设计及安全运行具有指导作用。

In order to evaluate the detonation influence in chemical laser combustor, the detonation from a lasing test in the deuterium fluoride （DF） laser is analyzed in depth. Numerical simulation of the detonation is conducted by the space-time conservation element and solution element （CE/SE） method. The simulation results indicate that the instantaneous pressure in the combnstor surges as the detonation takes place and spreads. The vibration, shock and torque acts resulting from the detonation lead to the maladjustment of the lasing resonator, which affects the normal running and lasing of the chemical laser. The results calculated from the simulation will play an important role in guiding the optimized design and the secure running of DF chemical lasers.