基于微空心阴极的空气等离子体射流研究

王宁; 段正超; 李佩贞; 何锋; 欧阳吉庭

doi:10.13568/j.cnki.651094.651316.2019.12.05.0001

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基于微空心阴极的空气等离子体射流研究

数理科学 | 更新时间：2026-01-21

- 基于微空心阴极的空气等离子体射流研究
- 基于微空心阴极的空气等离子体射流研究
- 新疆大学学报（自然科学版中英文） 2020年37卷第3期页码：260-265
- 作者机构：
  
  北京理工大学物理学院
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目（11475019）
- DOI：10.13568/j.cnki.651094.651316.2019.12.05.0001
  中图分类号： O532
- 纸质出版：2020
- 稿件说明：
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[1]王宁,段正超,李佩贞,等.基于微空心阴极的空气等离子体射流研究[J].新疆大学学报(自然科学版)(中英文),2020,37(03):260-265.
[1]王宁,段正超,李佩贞,等.基于微空心阴极的空气等离子体射流研究[J].新疆大学学报(自然科学版)(中英文),2020,37(03):260-265. DOI： 10.13568/j.cnki.651094.651316.2019.12.05.0001.

DOI：10.13568/j.cnki.651094.651316.2019.12.05.0001.

摘要

本文采用钼片-陶瓷-钼片的三明治型结构

研究了微空心阴极放电产生的空气等离子体射流特性.钼电极和陶瓷层的厚度均为0.8 mm

中心为0.5 mm的通孔

以压缩空气作为放电气体.上述结构在正、负直流电源驱动下均能获得等离子射流.实验结果表明

对于相同放电电流和相同气流条件下

正直流电源驱动放电所获得的等离子体射流长度略大于负直流电源下的射流长度.当气流量较低时

气流为层流状态

放电可处于稳定的直流辉光模式;当气流量较高时

气流处于湍流状态

放电主要为自脉冲模式.在湍流模式下

射流长度均随气流量的上升而增加.

Abstract

In this work

a sandwich-like structure of molybdenum-ceramic-molybdenum micro-hollow cathode(MHC) was used to generate the air plasma jet

and the characteristics of the jet were studied. The thicknesses of the molybdenum discs and the ceramic layer are all 0.8 mm. A hole with diameter of 0.5 mm drills through the sandwich MHC structure. The compressed air was fed through the hole. Being able to be driven by either positive or negative voltage power sources

this MHCD can generate a plasma jet. The results show that at the same voltage size and the same gas flow rate

the length of the plasma jet in stable discharge by a positive voltage source is a bit longer than that by a negative voltage source. For smaller flow rates

a laminar flow is maintained and the discharge can be operated in DC glow regime. For larger flow rate

a turbulent flow is obtained and the discharge is generally operated in self-pulsing regime. In turbulent flows

the plasma jet length increases with the increase of gas flow.

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Keywords

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