Freezing efficiency of f atom in oxidant nozzle of different contour walls , mixing mechanism of reactants in 2slot ( two - dimensional , plane symmetry nozzle ) nozzle and comparison of flow - fields & ssg between 2slot and 3slot ( 3 - slit jet plane nozzle ) have been studied by using 2d cr program . the conclusion is significant to understand the requirement of reactant flows and to generate ideas for nozzles design 利用二维r程序，研究了单喷管型面对f原子冻结效率等参数的影响：研究了二维平面对称喷管（ 2slo ）的反应流混合机制和混合角对激光器性能的影响；对比研究了zslot和三狭缝平面对称喷管oslot ）流场和增益特征。
