DF／HF化学激光器狭缝气膜冷却式喷管喉道的设计  

Design of Nozzle＇s Throat with Gaseous Film Cooling through Slot in DF/HF Chemical Laser

作　　者：高振于 袁圣付[1] 

机构地区：[1]国防科学技术大学光电科学与工程学院,湖南长沙410073

出　　处：《中国激光》2013年第B12期17-20,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金（10974255）

摘　　要：针对现有大功率DF／HF化学激光器增益发生器存在的喷管喉道烧蚀问题，采用狭缝气膜冷却式喷管实现对喷管壁面和喉道的保护。通过对不同气膜流量下喷管中流场参数的变化进行数值模拟，分析出气膜对主气流流动的影响，并得到气膜、主气流的理论喉道宽度与喷管物理喉道宽度之间的经验关系式，这对于狭缝气膜冷却式喷管喉道的设计具有指导意义。For the nozzle throat ablation problem existing in the gain generator of high power DF/HF chemical lasers, there is a way called film cooling, to protect the wall and the throat of the nozzle. The differences of flow characteristic are numerically simulated under the different mass fluxes of the helium film and the influence of film on main stream is analyzed. The relationship between the throat width of the helium film, the main stream and the nozzle＇s throat width is important for the design of nozzle＇s throat with gaseous film cooling through the slot .

关 键 词：激光器 DF HF化学激光器 喷管烧蚀 气膜冷却 数值模拟 

分 类 号：TN248.5[电子电信—物理电子学]