CHEN Kun¹， ZHANG Xiaoliang²， TAO Guangyuan²， WANG Haobo²， HUANG Bing²， ZHAO Yanli²

(1. Fengxian District Fire Rescue Detachment, Shanghai 201499, China;2. School of Urban Construction and Safety Engineering，Shanghai University of Applied Technology, Shanghai 201418, China)

Abstract: In order to study the influencing factors and discharge energy of electrostatic spark discharge, the relationship between electrostatic discharge spark diameter and energy level, electrode characteristics, ambient pressure, ambient wind speed, temperature and humidity, breakdown field strength and electrode gap, etc of electrostatic discharge sparks were studied using high-voltage spark generators and high-speed camera systems. The results show that when the electrode gap is 0.5 mm and the discharge voltage is 1 507 V, the time from spark generation to discharge channel breakdown is only 0.074 ms, and the duration of the whole discharge process is about 1.408 ms. Under the same electrode gap condition, the spark diameter gradually increases with the increase of spark energy level. The diameter of electrostatic discharge is the largest at stainless steel electrode, followed by copper electrode and the smallest at tungsten electrode. When the negative pressure increases from 0.01 MPa to 0.06 MPa and the positive pressure increases from 0.05 MPa to 0.5 MPa, the spark diameter decreases, but the change is not obvious. In addition, when the pressure is greater than 0.6 MPa, there is no discharge spark, and when the discharge energy is increased to 1 J, there is still no discharge spark. Environmental wind speed, temperature and humidity have less effect on spark diameter. With the increase of electrode gap, the critical breakdown voltage increases. There is a negative correlation between electrostatic shock penetration field strength and electrode clearance.

Keywords: electrostatic discharge； discharge energy； spark diameter

中图分类号： X932

文献标志码：A

文章编号：1008-5548(2021)05-0001-10

DOI:10.13732/j.issn.1008-5548.2021.05.001

收稿日期： 2021-03-08，修回日期：2021-03-21，在线出版时间：2021-06-18 08:54。

基金项目：国家自然科学基金项目，编号：51304137；上海应用技术大学科技发展基金项目，编号：KJFZ2018-5。

第一作者简介：陈坤(1985—)，男，研究方向为灭火救援和应急通信。E-mail：290038861@qq.com。

通信作者简介：张小良(1978—)，男，博士，教授，硕士生导师，研究方向为气体(粉体)爆炸防治。E-mail：yyyzxl@126.com。