DF化学激光器燃烧室中化学配比的数值研究

Numerical Study of Compositions Match in Combustor of DF Chemical Laser

本文利用最小自由能法计算了Ｈ２－ＮＦ３体系和Ｃ２Ｈ４－ＮＦ３体系的ＤＦ化学激光器燃烧室中的化学平衡组分，获得了不同体系ＤＦ化学激光器氧化剂与燃料的最佳配比，着重研究了燃料、稀释剂以及燃烧室压力对燃烧后产物中Ｆ原子浓度的影响。计算结果表明：Ｃ２Ｈ４－ＮＦ３体系燃烧产物中Ｆ原子的浓度要比Ｈ２－ＮＦ３体系高，无论是Ｈ２－ＮＦ３体系还是Ｃ２Ｈ４－ＮＦ３体系，当反应物中稀释剂的浓度较高时，燃烧产物中Ｆ原子的浓度随燃料和氧化剂比值的变化较缓慢，而当反应物中稀释剂的浓度比较低时，燃烧产物中Ｆ原子浓度对于燃料和氧化剂比值的变化就比较敏感。并将有关的计算结果与实验数据进行了比较。

The compositions of combustor of H 2 NF 3 and C 2H 4 NF 3 reaction system DF chemical laser are calculated by the method of minimum Gibbs free energy.The optimal match of fuel and oxidant of DF chemical laser is gained.The effect of the fuel,diluent and the pressure of combustor on the density of F atom is analyzed with emphasis.The calculation results show that the density of F atom of C 2H 4 NF 3 reaction system is higher than that of H 2 NF 3 reaction system.For both reaction system,when the density of diluent increases,the variation of F atom is small,when the density of diluent decreases the density of F atom is sensitive to the ratio of fuel and oxidant.The results of calculation and experiment are compared.