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单脉冲能量对光船推进性能的影响
引用本文:曹正蕊,洪延姬,李倩,王鹏,姚宏林.单脉冲能量对光船推进性能的影响[J].热科学与技术,2005,4(2):183-188.
作者姓名:曹正蕊  洪延姬  李倩  王鹏  姚宏林
作者单位:1. 装备指挥技术学院,研究生院,北京,101416
2. 装备指挥技术学院,基础部,北京,101416
摘    要:根据实验装置的形状,建立了点聚焦光船喷管内部等离子体流场演化的物理和数学模型;通过数值计算,获得了内流场的压强分布、推力随时间的变化规律以及光船获得的总冲量和冲量耦合系数。计算结果表明:点火区域和总冲量随着激光脉冲能量的增大而增大,而冲量耦合系数却有所减小。计算结果为在实验中选择合适的激光脉冲能量提供了理论依据。

关 键 词:推进性能  光船  冲量耦合系数  激光脉冲能量  等离子体流场  计算结果  实验装置  数学模型  数值计算  压强分布  变化规律  内流场  增大  时间
文章编号:1671-8097(2005)02-0183-06
修稿时间:2005年2月28日

Influence of laser pulse energy on propulsion performance of lightcraft
GAO Zheng-rui,HONG Yan-ji,LI Qian,WANG Peng,YAO Hong-lin.Influence of laser pulse energy on propulsion performance of lightcraft[J].Journal of Thermal Science and Technology,2005,4(2):183-188.
Authors:GAO Zheng-rui  HONG Yan-ji  LI Qian  WANG Peng  YAO Hong-lin
Affiliation:CAO Zheng-rui 1,HONG Yan-ji 2,LI Qian 2,WANG Peng 2,YAO Hong-lin 2
Abstract:Based on the shape of the experimental setting, the physical model and the mathematical model were established for the evolvement of plasma flow field produced by a laser focusing on a sphere region. The pressure distribution of the inner flow field and the thrust change with time were computed by a CFD software. The sum of impulse achieved by the lightcraft and impulse coupling coefficient were determined. The numerical results show that the impulse is going up with the enhancement of the laser pulse energy, whereas the value of the coupling coefficient is decreased. Numerical results provide a theoretical basis for determining the laser pulse energy in experiment for the further study.
Keywords:laser propulsion  pulse energy  ignition region  propulsion performance
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