| 基于椭球点火模型的脉冲激光推进流场演化数值研究 |
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| 引用本文： | 杨健,文明,洪延姬,叶继飞.基于椭球点火模型的脉冲激光推进流场演化数值研究[J].装备指挥技术学院学报,2007,18(6):92-95. |
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| 作者姓名： | 杨健 文明 洪延姬 叶继飞 |
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| 作者单位： | 1. 装备指挥技术学院,研究生管理大队,北京,101416
2. 装备指挥技术学院,基础部,北京,101416 |
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| 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。
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| 关 键 词： | 椭球点火 流场演化 数值计算 阴影实验 激光推进 |
| 文章编号： | 1673-0127（2007）06-0092-04 |
| 收稿时间： | 2007-04-28 |
| 修稿时间： | 2007年4月28日 |
Numerical Investigation on Evolvement of Flow Field in Pulsed Laser Propulsion Using Ellipsoid Ignition Model |
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| YANG Jian,WEN Ming,HONG Yanji,YE Jifei.Numerical Investigation on Evolvement of Flow Field in Pulsed Laser Propulsion Using Ellipsoid Ignition Model[J].Journal of the Academy of Equipment Command & Technology,2007,18(6):92-95. |
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| Authors: | YANG Jian WEN Ming HONG Yanji YE Jifei |
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| Abstract: | 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. |
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| Keywords: | ellipsoid ignition flow field evolvement numerical calculation shadow experiment laser propulsion |
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