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

作　　者：徐付强 岳明凯[1] 车龙[1] 董朋超 权康男 XU Fuqiang;YUE Mingkai;CHE Long;DONG Pengchao;QUAN Kangnan(Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学装备工程学院,沈阳110159

出　　处：《沈阳理工大学学报》2024年第5期63-68,76,共7页Journal of Shenyang Ligong University

基　　金：辽宁省教育厅高等学校基本科研项目(面上项目)(LJKMZ20220607)。

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。The characteristics of pulsed plasma jets are an important subject to study electrothermal chemical propulsion technology.Based on the experi mental results,the VOF model in Fluent soft-ware is used to simulate the expansion process of pu lsed plasma jets in the air,the expansion char-acteristics of pulsed plasma jets in the near flow f ield and the effect of molar mass on the expansion characteristics are studied.The results show that the simulation results are basically consistent wi th the experimental values,the jet morphology and sho ck wave structure are basically the same as the plasma jet images,and the established model is reli able.The larger the molar mass,the slower the de-velopment of the plasma jet,and the more delayed th e 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 e xpansion displacement,velocity and mixing degree of plasma jet decrease with the increase of molar ma ss.The results of this study can provide reference for the research of electrothermic chemical propul sion 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 

分 类 号：TJ399[兵器科学与技术—火炮、自动武器与弹药工程]