Schlieren optical visualization for transient EHD induced flow in a stratified dielectric liquid under gas-phase ac corona discharges
Schlieren optical visualization for transient EHD induced flow in a stratified dielectric liquid under gas-phase ac corona discharges
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DOI：
10.1088/0022-3727/40/2/036
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发表时间：
2007-01-21
影响因子：
3.4
通讯作者：
Chang, J. S.
中科院分区：
文献类型：
--
作者：
Ohyama, R.;Inoue, K.;Chang, J. S.
本文利用纹影光学系统对交流电晕放电场中分层介质流体的电流体动力学（EHD）诱导流动现象进行了流型表征。高压施加到气相中的针-板电极布置通常引发导电型EHD气流。虽然从电晕放电电极开始的EHD气体流动运动已被公知为电晕风，但尚未对暴露于气相交流电晕放电的分层介电液体的EHD流体流动运动进行全面的研究。实验观察结果清楚地表明，液相EHD流动现象诱导气相EHD流动通过界面动量转移。流动现象也讨论了气相EHD数减少气体压力（减少界面动量传递）条件下。
A flow pattern characterization of electrohydrodynamically ( EHD) induced flow phenomena of a stratified dielectric fluid situated in an ac corona discharge field is conducted by a Schlieren optical system. A high voltage application to a needle-plate electrode arrangement in gas-phase normally initiates a conductive type EHD gas flow. Although the EHD gas flow motion initiated from the corona discharge electrode has been well known as corona wind, no comprehensive study has been conducted for an EHD fluid flow motion of the stratified dielectric liquid that is exposed to the gas-phase ac corona discharge. The experimentally observed result clearly presents the liquid-phase EHD flow phenomenon induced from the gas-phase EHD flow via an interfacial momentum transfer. The flow phenomenon is also discussed in terms of the gas-phase EHD number under the reduced gas pressure ( reduced interfacial momentum transfer) conditions.