Corona discharge in electrospraying |
| |
| Institution: | 1. Chart Ferox, a. s., Department of Strength Calculations, Ústecká 30, 405 30 Děčín, Czech Republic;2. Technical University of Liberec, Faculty of Textile Engineering, Studentská 2, 461 17 Liberec, Czech Republic;3. Technical University of Liberec, Faculty of Science, Humanities and Education, Department of Physics, Studentská 2, 461 17 Liberec, Czech Republic;4. Technical University of Liberec, Faculty of Textile Engineering, Department of Nonwoven—Nanoscience Center, Studentská 2, 461 17 Liberec, Czech Republic;1. College of Information Science and Engineering, Huaqiao University, Xiamen City 361021, China;2. School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK;1. School of Electric Power, South China University of Technology, Guangzhou, 510640, China;2. Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, South China University of Technology, Guangzhou, 510640, China;3. The Beijing Key Laboratory of Multiphase Flow and Heat Transfer, North China Electric Power University, Beijing, 102206, China;1. Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;2. Department of Eco-Machinery, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea |
| |
| Abstract: | The paper presents investigations of current–voltage and light emission characteristics of electrospraying of various liquids in atmospheric air. The spectroscopic measurements have shown that the onset of corona discharge coincides with the onset of electrospraying, with the voltage increasing. The emission intensity in selected spectral lines during electrospraying depends on spraying mode, discharge power and a kind of liquid. In the specific experimental conditions in air, mainly the N2 second positive system, which is visible as violet faint light, has been recorded. The emission intensity of other gaseous species, which could be product of electrosprayed molecules decomposition or dissociation, was at very low level for the voltages applied, i.e., for glow or onset streamer discharges. From the measured light emission spectra of discharges from capillary nozzle and liquid jet, the dependence of the amplitude of selected spectral lines on capillary-nozzle voltage has been determined and it was found that this relation can be approximated by a third-degree polynomial function. This approximation has been supported by theoretical considerations. The presented results support the hypothesis that faint electrical discharges (glow, onset streamers) usually occur during and are inherent to electrospraying. |
| |
| Keywords: | Electrospraying Electrohydrodynamic spraying EHDA Optical emission spectroscopy Corona discharge Glow discharge |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
