基于压电探测判定激光支持燃烧波和爆轰波的点燃阈值  

Determination of ignition thresholds of laser supported combustion wave and detonation wave based on piezoelectric probe

作　　者：高翔[1] 冯国英[1] 朱海涛[1] 杨火木[1] 唐淳[2] 张凯[2] 周寿桓[1,3] 

机构地区：[1]四川大学电子信息学院,成都610064 [2]中国工程物理研究院应用电子学研究所,四川绵阳621900 [3]华北光电技术研究所,北京100015

出　　处：《强激光与粒子束》2011年第9期2305-2308,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(60890200)

摘　　要：为了获得激光支持燃烧波和爆轰波的点燃阈值,采用压电探测器检测波长为1 064nm的Nd:YAG激光作用在铝靶表面所产生的应变和冲压。从实验结果观察到压电信号的变化分为3个阶段,分别为光热弹性应变阶段、等离子体增强耦合阶段和激光支持爆轰波对靶表面的压力阶段,并从理论上研究了这3个阶段的激光与靶材料相互作用的机理,从而可以从压电信号是否发生跃变判断出激光支持燃烧波和激光支持爆轰波的点燃阈值,与其它方法所得到结果基本吻合。A new method of piezoelectric detection is presented for diagnosing ignition thresholds of LSCW and LSDW by measuring strain and stress,which generated on surface of target due to interaction between Nd：YAG laser operating at 1 064 nm and aluminum target.Changes of piezoelectric signal observed in experimental results might be divided into three stages,which can be explained as photothermal elastic strain,plasma enhanced coupling and LSDW pressure on the target surface in theory.Ignition thresholds of LSCW and LSDW can be determined by analyzing the shift of piezoelectric signal.Experimental results obtained are largely in accord with those from other methods.

关 键 词：激光支持燃烧波和激光支持爆轰波 压电探测 点燃阈值 光热弹性应变 

分 类 号：O347[理学—固体力学]