脉冲等离子体射流摩尔质量对其扩展特性的影响
Effect of Molar Mass on the Expansion Characteristics of Pulsed Plasma Jets
徐付强 1岳明凯 1车龙 1董朋超 1权康男1
作者信息
- 1. 沈阳理工大学 装备工程学院,沈阳 110159
- 折叠
摘要
脉冲等离子体射流特性是电热化学发射技术研究的重要内容.依据实验研究结果,采用Fluent软件中的VOF多相流模型对脉冲等离子体射流在大气中的扩展过程进行模拟,研究脉冲等离子体射流在近流场中的扩展特性及摩尔质量对扩展特性的影响规律.结果表明:仿真结果与实验数值基本吻合,射流形态和激波结构与等离子体射流图像基本相符,建立的模型比较可靠;摩尔质量越大,等离子体射流发展越迟缓,头部压力峰轴向位移越滞后,扩展初期的高温聚集区宽高比越大,射流的轴向扩展位移、速度以及掺混程度越小.本文研究结果可为电热化学发射技术及毛细管消融控制的相关研究提供参考.
Abstract
The characteristics of pulsed plasma jets are an important subject to study electrothermal chemical propulsion technology.Based on the experimental results,the VOF model in Fluent soft-ware is used to simulate the expansion process of pulsed plasma jets in the air,the expansion char-acteristics of pulsed plasma jets in the near flow field and the effect of molar mass on the expansion characteristics are studied.The results show that the simulation results are basically consistent with the experimental values,the jet morphology and shock wave structure are basically the same as the plasma jet images,and the established model is reliable.The larger the molar mass,the slower the de-velopment of the plasma jet,and the more delayed the axial displacement of the head pressure peak;at the initial stage of expansion,the aspect ratio of high temperature agglomeration area at jet head in-creases with the increase of molar mass;the axial expansion displacement,velocity and mixing degree of plasma jet decrease with the increase of molar mass.The results of this study can provide reference for the research of electrothermic chemical propulsion technology and capillary ablation control.
关键词
等离子体射流/VOF模型/扩展特性/摩尔质量Key words
plasma jet/VOF model/expansion characteristics/molar mass引用本文复制引用
基金项目
辽宁省教育厅高等学校基本科研项目(面上项目)(LJKMZ20220607)
出版年
2024
NETL
NSTL
万方数据