Numerical simulation of temperature field of metal/explosive structure irradiated by high energy laser

In order to analyze effect of different power laser on the temperature fields of the metal/explosive structure and the possibility of thermal explosion of the explosive, the three-dimensional temperature field of the metal/explosive structure irradiated by 55kW, 60kW, 65kW continuous laser was calculated based on a finite element analysis software, ANSYS. In the numerical model, the variation of the physical parameters of the metal materials and the surface energy coupling coefficient of steel target with the change of the temperature was also taken into account. The temperature distribution of the facular center axis direction and the temperature variation curve of the explosive and metal surface center with the change of irradiation time, were given. Under 5s of laser irradiation with different power, i.e., 55kW, 60kW and 65kW, the surface temperatures of the explosive were 521K,550K and 581K respectively. The greater the laser power, the higher the temperature and the easier the explosion. The temperature rise of the explosive is different when the power increases at different time. The temperature rise of the explosive occurs in a small area in contact with the metal within a certain irradiation time. These results have guiding significance to further study on metal/explosive irradiated by laser.