DF化学激光器扩压器恢复压力的研究  

Study on recovery pressure of diffuser for DF chemical laser

作　　者：郭洲 张洪强 杨珍 颜飞雪 Guo Zhou;Zhang Hongqiang;Yang Zhen;Yan Feixue(The 718th Research Institute of China Shipbuilding Industry Corporation,Handan 056027,China)

机构地区：[1]中国船舶集团有限公司第七一八研究所,河北邯郸056027

出　　处：《强激光与粒子束》2025年第2期31-36,共6页High Power Laser and Particle Beams

摘　　要：在化学激光器的研制中,扩压器压力恢复的研究具有重要的工程应用价值,通过数值模拟结合试验的方式对氟化氘(DF)化学激光器的扩压器进行展开研究,主要针对扩压器的扩张角、结构类型等参数对扩压器性能的影响进行计算分析并进行试验验证。研究结果表明:平直段+8°扩张角的扩压器,抵抗高背压的能力较弱,通过减小扩张角至5°可以有效提高抵抗背压的能力;进一步优化后的超声速二次喉道扩压器能够再次提高扩压器的恢复压力,减小气流的能量损失,提高抗反压特性。针对不同模型的扩压器进行了实验验证,实验结果与数值模拟的结果趋势较一致。In development of high-energy chemical laser,the research of diffuser pressure recovery has important engineering application value.In this paper,the diffuser of DF chemical laser is studied by numerical simulation and experiment.The effects of diffuser divergence angle and secondary-throat on diffuser performance are calculated,analyzed and verified by experiments.The results show that the diffuser with 8°divergence angle has weak ability to resist back pressure,and reducing the divergence angle to 5°can effectively improve the ability to resist back pressure.The further optimized supersonic diffuser with secondary-throat can increase the recovery pressure of the diffuser again,reduce the energy loss of the air flow and improve the anti-back pressure characterisitics.At the same time,experimental verification is carried out for different models of diffusers,and the result is consistent with the trend of numerical simulation results.

关 键 词：压力恢复 扩压器 扩张角 二次喉道 化学激光器 

分 类 号：O354.3[理学—流体力学]