化学激光器扩压器启动特性研究  

Study of diffuser’s start up property in chemical lasers

作　　者：李金雪 任晓明 郭洲 邱雄飞 Li Jinxue;Ren Xiaoming;Guo Zhou;Qiu Xiongfei(The 718th Research Institute of China Shipbuilding Industry Corporation,Handan 056027,China)

机构地区：[1]中国船舶集团公司第七一八研究所,河北邯郸056027

出　　处：《强激光与粒子束》2022年第3期38-42,共5页High Power Laser and Particle Beams

基　　金：国家高技术研究发展计划项目(2015AA8063032)。

摘　　要：为实现化学激光器的高速、低压尾气排入背压环境,需开展扩压器的启动特性研究。建立扩压器的仿真分析模型,根据激光器的实际工作需求,进行了扩压器总压11 kPa时的流场仿真,得到了不同背压情况下扩压器启动过程的流场,并提出扩压器逐级启动的工作方式。仿真结果显示,采用逐级启动的工作方式,扩压器以总压13 kPa启动直排入8 kPa的背景,流动稳定后将扩压器总压回调至11 kPa,实现了扩压器的正常启动。依托现有的激光器试车台进行了扩压器逐级启动的试验验证工作。试验结果表明,该种启动方式能够实现扩压器工作能力的提高。To discharge the chemical laser’s high-speed and low-pressure gas into the background,the start-up pressure determines the recovery pressure of the diffuser.Base on the laser’s actual requirement,the transient modle of the diffuser is established,and the different background pressure’s flow field is obtained with the total pressure 11 kPa on the diffuser’s inlet.The result shows that the diffuser can’t set up successfully when the background pressure increased to 8 kPa.According to the result,a step setup mode is used,the diffuser start up with total pressure 13 kPa,when the flow field is steady,adjusting the inlet’s total pressure to 11 kPa,the diffuser starts up successfully.Experiment is carried out on the DF laser’s test-bed,the result shows that the diffuser’s ability is advanced.

关 键 词：化学激光器 扩压器 启动 总压 背压 

分 类 号：V228.7[航空宇航科学与技术—飞行器设计]