Coupled thermal-fluid-structure behavior of airflow over target irradiated by high-power laser

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	Coupled thermal-fluid-structure behavior of airflow over target irradiated by high-power laser
	Huang YH(黄亿辉); Song HW(宋宏伟); Huang CG(黄晨光); Huang, YH (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
会议录名称	2ND INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER (LIMIS 2012)
	2013
页码	879605
会议名称	2nd International Symposium on Laser Interaction with Matter (LIMIS)
会议日期	SEP 09-12, 2012
会议地点	Xian, PEOPLES R CHINA
摘要	In this paper, a coupled thermal-fluid-structure numerical model is presented to investigate interactive effects of airflow, high power laser and metallic target. The numerical model is validated by experiments recently carried out by Lawrence Livermore National Laboratory. The numerical simulation also verified some experimental observations, which show that the convective heat transfer effects of airflow and the aerodynamic pressure play important roles to the damage behavior of laser irradiated target. The convective heat transfer of airflow reduces the temperature of laser irradiated area therefore delays the time reaching damage. When a thin-walled metallic panel is heated up to a high temperature below the melting point, it is softened and the strength nearly vanishes, the aerodynamic pressure becomes a dominant factor that controls the damage pattern even when it is in a low magnitude. The effects of airflow velocity and laser power on the damage behavior of irradiated metallic target are investigated with the aid of the coupled thermal-fluid-structure numerical model, where critical irradiation times to reach the yield failure yield t(yield) and melting failure t(yield) are the main concern. Results show that, when the incidence laser power increases from 500 W/cm(2) to 5000 W/cm(2), significant drop in failure times are found as the incidence laser power increases. When the Mach number of airflow increases from 1.2 to 4.0 at a given incident laser power, a critical airflow velocity is found for the irradiation time to reach the yield strength and melting point, i.e., the maximum irradiation time to reach failure is found at the Mach 1.8 similar to 2.0. The competition of aerodynamic heating before the laser is switch on and airflow cooling after the target is heated up accounts for effects.
关键词	Laser Irradiation Thermo-mechanical Effect Coupled Thermal-fluid-structure Airflow
WOS记录号	WOS:000323339600005
课题组名称	LMFS冲击与耦合效应(LHO) ; LMFS热结构耦合力学
ISBN号	978-0-8194-9639-3
URL	查看原文
收录类别	CPCI-S ; EI
语种	英语
引用统计
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47575
专题	流固耦合系统力学重点实验室
通讯作者	Huang, YH (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Huang YH,Song HW,Huang CG,et al. Coupled thermal-fluid-structure behavior of airflow over target irradiated by high-power laser[C]2ND INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER (LIMIS 2012),2013:879605.

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