IMECH-IR  > 流固耦合系统力学重点实验室
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.
Source Publication2ND INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER (LIMIS 2012)
2013
Pages879605
Conference Name2nd International Symposium on Laser Interaction with Matter (LIMIS)
Conference DateSEP 09-12, 2012
Conference PlaceXian, PEOPLES R CHINA
AbstractIn 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.
KeywordLaser Irradiation Thermo-mechanical Effect Coupled Thermal-fluid-structure Airflow
WOS IDWOS:000323339600005
DepartmentLMFS冲击与耦合效应(LHO) ; LMFS热结构耦合力学
ISBN978-0-8194-9639-3
URL查看原文
Indexed ByCPCI-S ; EI
Language英语
Citation statistics
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47575
Collection流固耦合系统力学重点实验室
Corresponding AuthorHuang, YH (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
Recommended Citation
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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