Image analysis of gas-phase corona discharge induced electrohydrodynamic liquid flow in stratified fluid observed by particle image velocimetry

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI:10.1109/CEIDP.1999.807920

R. Ohyama, Jen-Shih Chang

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引用次数: 1

Abstract

Analysis of gas-phase needle-plate corona discharge induced electrohydrodynamic liquid flow in stratified fluid is carried out by image processing from the experimental results. In this paper, the flow velocity distribution is experimentally obtained by a particle image velocimetry with image processing, where the measurement system takes sequential digital images of flow field illuminated by a laser light sheet for computed tomography. The results show that the electrohydrodynamic induced fluid flow direction on an electrode axis is not from needle electrode to plate electrode axis when needle electrode position above liquid layer. For the case of the needle electrode tip immersed into the dielectric liquid, it is well known that the dielectric liquid makes anticlockwise rotation by contraries. Hence, new approaches are required for the analyses of the present type electrohydrodynamic fluid motion. The mechanistic model based on interfacial momentum transfer effects on liquid-phase fluid motion is discussed in detail.

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粒子图像测速法观测层状流体中气相电晕放电诱导电流体动力流动的图像分析

对实验结果进行图像处理，对分层流体中气相针板电晕放电诱导的电流体动力流动进行了分析。本文采用图像处理的粒子图像测速法，实验得到了流场的速度分布，测量系统在激光光片照射下获取流场的连续数字图像，用于计算机断层扫描。结果表明:当针电极位于液层上方时，电流体动力诱导流体在电极轴上的流动方向不是从针电极流向板电极轴;对于针电极尖端浸入介质液体的情况，众所周知，介质液体反向逆时针旋转。因此，需要新的方法来分析当前类型的电流体动力流体运动。详细讨论了基于界面动量传递效应的液相流体运动机理模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)

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