激光等离子体烧蚀推力的机理研究
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Mechanism investigation on thrusting forcefrom ablation plasma by laser
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    摘要:

    随着航天空航空天技术的发展,激光等离子体推进受到了人们的普遍关注。基于激光与物质相互作用产生等离子体的空间分布,本文从微观、宏观和简化模型推导了碳靶的烧蚀压与激光强度的幂函数关系,幂指数分别是0.60493、2/3和2/3。实验测得碳靶的最大偏移量与激光能量的幂函数关系,幂指数为0.61936。实验与微观模型的幂指数相对相差大约仅有约2.32,而与宏观或简化模型的幂指数相对相差大约达到了约7.64,这表明了微介模型的合理性。然而,在误差允许的范围内,宏观或简化模型也是适用的。激光等离子体烧蚀推力的机理分析对开展工程研究具有一定的指导意义。

    Abstract:

    With the development of aerospace and airspace technology,laser plasma propulsion has attracted more and more attention.Based on spatial distribution of the plasma from laser interacting with substance,in this paper,the power function relationship between ablation pressure of carbon target and laser intensity is deduced from microscopic,macroscopic and simplified models,the power indices are 0.60493,2/3 and 2/3,respectively.The experiment shows the power function relationship between the maximum deviation of carbon target and the laser energy,and the power index is 0.61936.The relative difference of power index between the experiment and the microscopic model is only about 2.32%,while the value between the experiment and the macroscopic or simplified model attains about 7.64%,this indicates the rationality of the microscopic model.However,either the macroscopic or the simplified model is also applicable to some extent that the error permits.The mechanism analysis of laser plasma ablation thrust has some guiding significance for engineering research.

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马真艳,张兴强.激光等离子体烧蚀推力的机理研究[J].激光与红外,2021,51(7):843~847
MA Zhen-yan, ZHANG Xing-qiang. Mechanism investigation on thrusting forcefrom ablation plasma by laser[J]. LASER & INFRARED,2021,51(7):843~847

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  • 在线发布日期: 2021-07-22