利用压缩比例（ｃｏｍｐｒｅｓｉｂｌｅｓｃａｌｉｎｇ）方法模拟了三喷管型连续波ＨＦ化学激光器的喷管流场和光腔流场，研究了气体组分质量流量对激光器性能的影响，给出了光腔流场中平均腔压、平均辐射强度的分布以及激光器功率、化学效率的变化规律 The nozzle flow field and cavity flow field of a triple-nozzle CW CW laser were simulated by compresiblescaling method. The influence of gas mass flow rate on the laser performance was studied. The average Cavity pressure, the distribution of average radiation intensity and the variation of laser power and chemical efficiency