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采用三温度11组元热化学非平衡空气模型计算了激光能量在等离子体中的沉积过程,并在激光脉冲作用结束8μs后采用平衡空气模型,完成激光推进光船工作过程的数值模拟,研究了不同入射激光能量和脉冲宽度对光船推进性能的影响。结果表明:当脉冲宽度相同时,入射激光能量越大,所得冲量耦合系数越大;当入射激光脉冲能量相同时,脉冲宽度越小,所得冲量耦合系数越大。将计算所得冲量耦合系数与Schall实验所得结果进行比较,结果非常吻合。
The deposition process of laser energy in plasma was calculated by the three temperature and 11 element thermochemical non-equilibrium air model. The equilibrium air model was used after the laser pulse ended for 8μs. The numerical simulation of the work process of the laser light boat was completed. Influence of different incident laser energy and pulse width on the light propulsion performance. The results show that when the pulse width is the same, the larger the incident laser energy is, the larger the coupling coefficient of the impulse is. When the incident laser pulse energy is the same, the smaller the pulse width is, the larger the impulse coupling coefficient is. Comparing the calculated impulse coupling coefficient with the Schall experiment results, the results are in good agreement.