个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:电气工程学院
学科:环境工程. 电工理论与新技术. 高电压与绝缘技术
办公地点:大连理工大学电气工程学院静电所
Optical characteristics of the filamentary and diffuse modes in surface dielectric barrier discharge
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论文类型:期刊论文
发表时间:2016-11-05
发表刊物:SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
收录刊物:SCIE、EI、PubMed、Scopus
卷号:168
页面范围:230-234
ISSN号:1386-1425
关键字:Surface DBD; Morphological image; Rotational temperature; Filamentary discharge; Diffuse discharge
摘要:Surface dielectric barrier discharge (DBD) plasmas generally exhibits filamentary and diffuse discharges at atmospheric air. The focus of this investigation is on the different optical characteristics and quantitative research about morphological features of two discharge modes. The temporally and spatially resolved characteristics of discharge phenomenon together with the gas temperature are presented with microsecond time scale. Discharge area is estimated by the sum of pixels that equal to "1" in MATLAB software. The formation of diffuse plasma mainly depends on an increase of the ionization coefficient and a creation of sufficient seed electrons by the Penning effect at low electric fields. Accordingly, experimental measurements show that diffuse discharge during the negative half cycle has good uniformity and stability compared with filamentary discharge during the positive half cycle. The rotational temperatures of plasma are determined by comparing the experimental spectra with the simulated spectra that have been investigated. The plasma gas temperature keeps almost constant in the filamentary discharge phase and subsequently increased by about 115 K during the diffuse discharge. In addition, it is shown to be nearly identical in the axial direction. Non-uniform temperature distribution can be observed in the radial direction with large fluctuations. The plasma length is demonstrated almost the same between two discharge modes. (C) 2016 Elsevier B.V. All rights reserved.