摘要
在激光冲击处理过程中,光斑为mm尺度下,研究脉冲激光辐射带有透明约束层及深色涂层的靶材时,考虑了可能出现液相区的情况下,初步建立了激光冲击处理液相区的理论模型.根据流体动力学的质量连续性、动量守恒和能量守恒基本方程,建立了液相区的力学方程.初始条件采用Zhang Wenwu等人的改进模型,并利用Matlab对其进行了研究分析.着重研究了初始激光功率密度分别为20 TW/m2和40 TW/m2时液相区对冲击波峰值压力的影响,并用CFD软件进行了仿真计算.结果表明:液相区对峰值压力的影响是存在的,在需要精确计算峰值压力的情况下,液相区的影响是不可忽略的.
The theory model was given for laser shock processing of microscale spot with transparent confining medium and painting coating layer when the potential liquid phase was considered. The dy-namic equations were established, its initial conditions adopt the modified model by Zhang wenwu et al, as according the basic equations of mass continuity, momentum conservation and energy conservation and investigating the target material with confining medium and coating layer irradiated by pulse laser. Matlab was used to investigate in detail and analyze the issue. Special attention was paid to the influence of liquid phase on peak pressure of shock waves at laser densities of 20 TW/m^2 and 40 TW/ m^2 using CFD （computational fluid dynamics） soft to make simulation computation. The results showed that the influence of liquid phase on peak pressure is existent. It should not be neglected under the condition of precise calculation for peak pressure.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第6期14-17,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50575078)
国家重点基础研究发展计划资助项目(2003CB716207)
关键词
流体动力学
激光冲击处理
液相
等离子体
峰值压力
hydrodynamics
laser shock processing （LSP） liquid phase
plasma
peak pressure
