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研究了将分别应用在连续波DF/HF化学激光器增益发生器上的气膜冷却方式和在燃烧室中的两步燃烧方式相结合的方式,这可通过转移部分主稀释剂至主喷管收缩段注入来实现。通过数值模拟方法对该应用下光腔内流场进行分析,结果显示谱线小信号增益系数有小幅增大,但两步燃烧方式较高的燃烧效率没有显著体现,且高温气流对燃烧室提出更高要求。通过增加氧化剂过量系数可降低燃烧室总温,且增益系数有所增大。
The combination of the film cooling method and the two-step combustion method in the combustion chamber respectively applied to the continuous-wave DF / HF chemical laser gain generator was studied. This method can be achieved by transferring part of the main diluent to the main nozzle to shrink Segment injection to achieve. The numerical simulation results show that the small signal gain coefficient of the line has a slight increase, but the combustion efficiency of the two-step combustion method is not obvious, and the high temperature air flow to the combustion chamber Higher requirements. By increasing the oxidant excess coefficient can reduce the total temperature of the combustion chamber, and the gain coefficient has increased.