LSDW速度随激光参数和环境气体压强变化规律的实验研究

Experimental study on effects of laser parameters and ambient air pressure on LSDW velocity

关键词:  吸气式激光推进  激光维持的爆轰波(LSDW)  波速  实验研究

Key words:  Air-breathing laser propulsion  Laser supported detonation wave (LSDW)  Wave velocity  Experimental study

摘要:

对LSDW速度随入射激光能量、激光聚焦角度和环境气体压强变化的规律进行了实验研究。研究发现,入射单脉冲激光能量越大,聚焦角度越小,环境气体压强越小,LSDW的传播速度越大。实验测量得到的LS-DW速度随入射激光能量、聚焦角度和环境气体压强的变化规律与一维理论公式中体现的规律完全一致。将相同条件下的实验数据与理论结果进行比较后发现,二者在定性上取得了很好的一致性,但在定量上有所差别,因此需要对现有一维理论公式进行修正,以便更深入地研究LSDW的传播演化规律和特性。

Abstract:

Effects of incident laser energy,focusing angle and ambient air pressure on LSDW velocity were studied experimentally.Results indicate that LSDW velocity increases with the increasing of incident single pulse laser energy,decreasing of laser focusing angle and ambient air pressure.Relations between LSDW velocity and incident laser energy,focusing angle and ambient air pressure obtained from experiment agree well with one-dimensional theoretical formula.Compared experimental data with theoretical result,it is found that there are quantitative differences between them.Therefore,it is necessary to amend current one-dimensional theoretical formula,so as to get deeper understanding on the characteristic of LSDW propagation.