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根据连续激光加热靶材的实际情况,建立了连续激光辐照材料的三维物理模型。结合实际的边界条件,采用基于积分变换的方法推导出材料的瞬态温度场的解析表达式。利用Matlab软件数值模拟了连续激光辐照材料的温升过程,分析了材料的各向异性对温度场的影响,并且讨论了激光参数、辐照时间以及环境变化对靶材温升的影响。结果表明:材料的各向异性将导致温度场的非对称温升;材料表面温升随激光功率和辐照时间的增大而增大;同时材料侧面与空气的对流换热系数对材料表面的温度场分布也起到了一定的影响。
According to the actual situation of continuous laser heating target, a three-dimensional physical model of continuous laser irradiated material was established. According to the actual boundary conditions, the analytical expression of the transient temperature field of the material is derived based on the integral transformation method. The temperature rising process of continuous laser irradiated materials was numerically simulated by Matlab software. The influence of material anisotropy on temperature field was analyzed. The effects of laser parameters, irradiation time and environmental changes on temperature rise of target were also discussed. The results show that the anisotropy of material leads to the asymmetric temperature rise of the temperature field. The temperature rise of the material surface increases with the increase of the laser power and the irradiation time. At the same time, the convective heat transfer coefficient of the material side and air Temperature field distribution also played a certain impact.