摘要
针对主流无载气、副流以氮气为载气的氧碘化学激光(COIL),应用求解3维多组分化学反应流方程的数值方法,对流场和物理化学的耦合过程进行细致研究,对副流载气变化带来的问题及性能提升的手段、特别是合理的配气方式进行深入分析。结果表明:传统的在亚声速段进行喷流的配气方式不适用于主流无载气N2-COIL系统,必须采用超声速段射流方式;合理的流量配比条件下,超声速段射流方式COIL光腔位置处增益可达1.5%cm-1;N2-COIL流场边界层厚度明显减小,拓宽了增益的有效分布区域。
3-D Navier-Stocks equation with multi species and chemical reaction process was applied with CFD method on the chemical oxygen iodine laser（COIL） model using nitrogen as diluents gas to investigate the detailed flow field and the coupling between physical and chemical process,especially the appropriate mixing technique.It is found that mixing by jet in the subsonic section is inapplicable to the N2-COIL without primary buffer gas;jet in supersonic is necessary and with the appropriate flow rate ratio,the small signal gain could reach 1.5% cm-1 in the position of cavity;the efficient area of gain is widened since the thickness of boundary layer is reduced as the result of mixture weight increase.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2010年第8期1875-1880,共6页
High Power Laser and Particle Beams
关键词
氧碘化学激光
主流无载气
氮气
增益系数
超声速段射流
边界层
chemical oxygen iodine laser
without primary buffer gas
nitrogen
gain
jet in supersonic section
boundary layer
