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采用数值模拟方法分析研究了激光点火过程中能量源与含能材料的作用机理以及影响点火的因素。以激光点火的热作用机理为基础,结合声光理论建立并求解了含能材料激光点火过程强瞬态热传导-气动力耦合模型。通过计算分析得到了激光能量、光斑面积、含能材料光反射率和吸收系数等因素对含能材料表面温度和激光点火过程的影响。该研究结果有助于优化点火参数,提高激光点火的可靠性。
The mechanism of energy source and energy-containing material during laser ignition and the factors affecting the ignition are analyzed by numerical simulation method. Based on the thermo-mechanical mechanism of laser ignition, a strong transient heat conduction-aerodynamic coupling model for laser ignition of energetic materials was established and solved based on acousto-optic theory. The effects of laser energy, spot area, optical reflectance and absorption coefficient of energetic materials on the surface temperature and laser ignition process of energetic materials were obtained through calculation and analysis. The results of this study help to optimize the ignition parameters and improve the reliability of laser ignition.