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为了对H+NCl_3+HI体系进行优化,利用Matlab开发了化学动力学模拟计算程序,使用一维预混模型对产生NCl(a~1△)-I传能化学激光的过程进行了化学动力学模拟计算。考察了不同温度下H原子,NCl_3和HI的初始粒子数密度及其化学计量配比对小信号增益系数的影响。固定温度和H粒子数密度,通过在一定的粒子数密度范围内进行扫描计算,确定了最佳的NCl_3/H和HI/H配比范围。最后对H,NCl_3和HI的化学计量配比对最佳小信号增益系数及增益持续时间的影响进行了讨沦。计算结果表明,当温度为400 K,初始H粒子数密度分别为1×10~(15)cm~(-3),1×10~(16)cm~(-3)和1×10~(17)cm~(-3)时,最佳小信号增益系数可分别达到2.6×10~(-4)cm~(-1),2.6×10~(-1)cm~(-3)和2.6×10~(-2)cm~(-3),而相应NCl_3/H和HI/H的初始粒子数密度化学计量配比分别为45%和11%。计算结果还发现,随温度的逐渐升高,获得最佳小信号增益系数的NCl_3/H和HI/H的初始粒子数密度化学计量配比逐渐增大.而获得的最佳小信号增益系数也在增加。
In order to optimize the H + NCl_3 + HI system, a chemical kinetic simulation program was developed by using Matlab, and the chemical kinetics of the NCl (a ~ 1 △) -I transfer chemical laser using the one-dimensional premix model was studied. Simulation calculation. The influence of initial particle number density and stoichiometry of H atom, NCl_3 and HI on the small signal gain coefficient was investigated under different temperatures. Fixed temperature and H particle number density, through the calculation of the number of particles in a certain range of scanning density, to determine the best NCl_3 / H and HI / H ratio range. Finally, the effects of stoichiometry of H, NCl_3 and HI on the best small signal gain coefficient and gain duration were discussed. The results show that when the temperature is 400 K, the initial density of H particles is 1 × 10 ~ (15) cm ~ (-3), 1 × 10 ~ (16) cm ~ (-3) and 1 × 10 ~ 17) cm ~ (-3), the best small signal gain coefficient can reach 2.6 × 10 ~ (-4) cm -1, 2.6 × 10 -1 cm -3 and 2.6 × 10 ~ (-2) cm ~ (-3), while the corresponding stoichiometry of the initial population density of NCl_3 / H and HI / H were 45% and 11%, respectively. The results also show that with the gradual increase of temperature, the initial stoichiometry of NCl_3 / H and HI / H with the best small signal gain coefficient gradually increases, and the optimal small signal gain coefficient Increasing.