固体火箭技术2013，Vol.36Issue(3)：346-352,7.DOI:10.7673/j.issn.1006-2793.2013.03.012
基于克努森模型的脉冲等离子体推力器烧蚀边界层数值研究
Numerical analysis on ablating boundary layers of pusled plasma thruster based on Knudsen model
摘要
Abstract
In order to accurately describe the essential relationship between ablation processes and inflow conditions for pulsed plasma thruster (PPT),the characters of ablating boundary and internal reflux mechanism were simulated numerically by Knudsen analytical model using bimodal velocity distribution function.For the deficiencies of K-B model in actual PPT ablation,the method adding the energy due to internal degrees while applying the conservation of energy flux was used on the basis of chemical kinetics simulation of vapor composition.Effects of thermochemical reaction on the thermodynamic state around ablating boundary layers,as well as the internal flow were deeply analyzed and Knudsen analytical model was formed to adapt to the PPT ablation.The boundary relation of hydrodynamic non-equilibrium layer was then established on momentum.Combined with the electric and configuration parameters of the parallel-plate PPT,numerical examples were given for the analysis of the influence of boundary layer and state conditions on the "late-time" ablating rate.It is valuable for theoretically studying the coupled character of ablation and plasma flow in PPT.关键词
电推进/脉冲等离子体推力器/克努森层/烧蚀Key words
electric propulsion/ pulsed plasma thruster/ Knudsen layer/ ablation分类
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杨磊,刘向阳,武志文,王宁飞..基于克努森模型的脉冲等离子体推力器烧蚀边界层数值研究[J].固体火箭技术,2013,36(3):346-352,7.
