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优化了一维纳秒脉冲激光等离子体化空间碎片的流体力学模型。流体力学模型分为等离子体状态方程求解、空间碎片与激光能量耦合计算、激光推进冲量耦合系数计算三个模块。在各模块实现的基础上,重点分析了碎片等离子体温度、速度、压强、密度的时间和空间分布规律。考虑到等离子体屏蔽效应对激光效能的影响,提出等离子体对激光逐层吸收的计算方法,更准确分析激光功率密度和脉宽对激光清理空间碎片效能的影响,提出了获取最优激光效能的方法。最后与实验经验公式解相比较,验证了优化模型的正确性。
The fluid mechanics model of one-dimensional nanosecond laser plasma-engineered space debris is optimized. The fluid mechanics model is divided into the plasma equation of state, the space debris and the laser energy coupling calculation, the laser propulsion impulse coupling coefficient calculation three modules. Based on the realization of each module, the temporal and spatial distribution of temperature, velocity, pressure and density of debris plasma are analyzed emphatically. Considering the influence of the plasma shielding effect on the laser performance, a method of calculating the laser layer-by-layer absorption by the plasma and a more accurate analysis of the influence of the laser power density and the pulse width on the laser cleaning of the space debris performance are proposed. method. Finally, compared with the experimental empirical formula solution, the correctness of the optimization model is verified.