Study On Multiple Pulse Laser Supported Detonation Wave Mechanism And Experiment

Lasers support detonation wave(LSDW)is one of the laser-material processing phenomenon.It has an extensive application prospects in aerospace propulsion and laser micro process.Research on LSDW is significance.We study on theory of LSDW and laser-material interaction.Analysis both LSDW mechanism and material physics changing process.We also do a lot of research on plasma performance.According to these theories we set up a LSDW generating project.On the basis of the project,the experimental platform was set up to ready.At last summarize and analyze the existing shortcomings of this scheme.We finish Q-switch part of triple pluses laser scheme After debugging and running working installation.Finally we text acoustic signal of LSDW,and analysis those sample.The signals obtained in the experiment of the bombardment of the target are analyzed and verified.In the experiment,the acoustic signal is very strong,and the acoustic frequency distribution is consistent with the characteristics of the detonation wave frequency,so the three pulse laser can effectively excite the detonation wave.In addition,the frequency distribution of the steel and aluminum target signal is found in the frequency range of 150-300 Khz acoustic signal is stronger,the silicon material in this frequency range signal amplitude is better than the theoretical expectations.The experimental results of multi pulse laser supported detonation wave show that: the multi pulse laser ablation of aluminum material,resulting in cavity structure,the eruption of a large number of debris and to the cavity structure,surrounded by diffusion,deposition.Obvious damage effect on the target.