Laser-sustained argon plasmas, for thermal rocket propulsion
Laser-sustained argon plasmas, for thermal rocket propulsion
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激光维持氩等离子体，用于热火箭推进
DOI：
10.2514/6.1988-2773
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
J. MazumderJ
中科院分区：
文献类型：
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作者：
D. Zerkle;S. Schwartz;A. Mertogul;Xiangli Chen;H. Krier;J. MazumderJ
本文报道了激光维持氩等离子体在强迫对流状态下的研究结果。等离子体吸收和热效率是测量的关键参数。流速高达30米/秒，在一个大气压至13.6米/秒，在2.5大气压施加在等离子体持续在2.5，5.0，和7.0千瓦的输入激光功率，使用f/4或f/7光束聚焦的几何形状。吸收范围从55至91%，热效率范围从11至46%，这取决于操作条件。如此高的吸收率和效率以前从未报道过，这表明激光推进可能是一种实用的轨道转移概念。等离子体核心的光谱分析与传统技术同时使用来分析等离子体行为。
The results of the ongoing investigation of laser-sustained argon plasmas in the forced convective flow regime are reported. Plasma absorption and thermal efficiency are the key parameters measured. Flow velocities of up to 30 m/s at one atm to 13.6 m/s at 2.5 atm are imposed upon plasmas sustained at 2.5, 5.0, and 7.0 kW input laser powers, using either f/4 or f/7 beam focusing geometries. Absorption ranged from 55 to 91% and thermal efficiency ranged from 11 to 46%, depending upon the operating conditions. Absorptions and efficiencies this high have never before been reported and demonstrate that laser propulsion could be a practical orbital transfer concept. Spectroscopic analysis of the plasma core is used concurrently with conventional techniques to analyze plasma behavior.