摘要
在阴影实验中拍摄到了脉冲激光点火形成的流场演化过程。通过分析等离子体的形状，对激光能量注入过程中伴随的复杂物理现象加以简化，建立了三维椭球点火数值计算模型。模拟了无约束、50J脉冲激光作用下流场的演化过程，并根据波阵面位置随时间的推移情况，计算了流场的激波速度。计算结果与阴影实验吻合良好，表明椭球点火模型能够比较真实地模拟流场演化过程，可用于研究点火条件对推进性能的影响。
Based on analyzing the shape of plasma ignited by laser pulse, which was shot in shadow experiment, the paper simplifies the complicated physical phenomena in the course of energy injection, and develops a three-dimensional ellipsoid-ignition model for numerical calculation. Utilizing this model, it simulates the evolvement of no-constrain flow field ignited by 50 J pulse laser and gaines the calculation results are in well agreement with the experiment data, which proved that the model of elipsodal-ignition was proper. This work can play an important role in simulating the evolvement of flow field and be useful to study the influence of ignition conditions on propulsion performance.
出处
《装备指挥技术学院学报》
2007年第6期92-95,共4页
Journal of the Academy of Equipment Command & Technology
基金
国家重大基础研究项目
关键词
椭球点火
流场演化
数值计算
阴影实验
激光推进
ellipsoid ignition
flow field evolvement
numerical calculation
shadow experiment
laser propulsion
