圆筒内氢等离子体非定常化学反应羽流场DSMC分析

doi:10.19596/j.cnki.1001-246x.7891

计算物理 ›› 2019, Vol. 36 ›› Issue (5): 533-541.DOI: 10.19596/j.cnki.1001-246x.7891

圆筒内氢等离子体非定常化学反应羽流场DSMC分析

苏永元, 李洁, 范正磊

国防科技大学空天科学学院, 长沙 410073

收稿日期:2018-04-27 修回日期:2018-06-28 出版日期:2019-09-25 发布日期:2019-09-25
作者简介:苏永元(1994-),男,汉族,云南腾冲,硕士研究生,主要从事计算流体力学研究,E-mail:1156372010@qq.com
基金资助:
国家自然科学基金委员会与中国工程物理研究院联合基金（U1730247）资助项目

DSMC Analysis of Unsteady Chemical Reactions of Hydrogen Plasma in Cylinder

SU Yongyuan, LI Jie, FAN Zhenglei

College of Aerospace Science and Engineering, National University of Defense Technology, Hunan Changsha 410073, China

Received:2018-04-27 Revised:2018-06-28 Online:2019-09-25 Published:2019-09-25

摘要/Abstract

摘要： 利用直接模拟Monte Carlo方法研究圆筒侧壁注入氢等离子体羽流场在8×10^-6s内的非定常流动特性.根据Bird的化学反应模型考虑离解-复合反应模型和电荷转移反应模型.在流场中注入H₂、H、金属原子X、H₂⁺和H⁺五种组分，研究离解-复合反应对流场中粒子分布和密度的影响，结果表明离解-复合反应使H₂数密度降低，H数密度增加，说明在流场中H₂的离解反应速率大于H的复合反应速率.加入电荷转移反应后H₂⁺数密度降低，H⁺数密度增加，对其他组分数密度没有显著影响.

关键词: DSMC方法, 离解-复合反应, 电荷转移反应

Abstract: Unsteady flow characteristics of particles in plumes are studied with direct simulation Monte-Carlo method (DSMC) in an 8×10^-6 s period. Dissociation model, recombination model and charge exchange model are included based on Bird's chemical reaction models. Molecular hydrogen H₂, atomic hydrogen H, atomic metal X, ion H₂⁺ and ion H⁺ are included. Influence on density distribution of particles in the field due to dissociation and recombination is studied. It shows that the number density of molecular hydrogen H₂ decreases and the number density of atomic H increases since dissociation rate of molecular hydrogen H₂ is faster than recombination of atomic H in the flow field. A charge exchange model is added in dissociation and recombination models. It shows that the number density of ion H₂⁺ decreases and the number density of ion H⁺ increases obviously in charge exchange model.

Key words: DSMC method, dissociation-recombination reaction, charge exchange reaction

中图分类号:

苏永元, 李洁, 范正磊. 圆筒内氢等离子体非定常化学反应羽流场DSMC分析[J]. 计算物理, 2019, 36(5): 533-541.

SU Yongyuan, LI Jie, FAN Zhenglei. DSMC Analysis of Unsteady Chemical Reactions of Hydrogen Plasma in Cylinder[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2019, 36(5): 533-541.

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圆筒内氢等离子体非定常化学反应羽流场DSMC分析

DSMC Analysis of Unsteady Chemical Reactions of Hydrogen Plasma in Cylinder

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