An Experimental Visualization and Image Analysis of Electrohydrodynamically Induced Vapor-Phase Silicon Oil Flow under DC Corona Discharge

Autor:	Masaru Fukumoto, Ryu-ichiro Ohyama
Rok vydání:	2004
Předmět:	Flow visualization Ion wind Chemistry Brush discharge Electrode Liquid dielectric Analytical chemistry Mechanics Electrohydrodynamics Electrical and Electronic Engineering Current (fluid) Corona discharge
Zdroj:	IEEJ Transactions on Fundamentals and Materials. 124:961-965
ISSN:	1347-5533 0385-4205
DOI:	10.1541/ieejfms.124.961
Popis:	A DC corona discharge induced electrohydrodynamic (EHD) flow phenomenon for a multi-phase fluid containing a vapor-phase dielectric liquid in the fresh air was investigated. The experimental electrode system was a simple arrangement of needle-plate electrodes for the corona discharges and high-resistivity silicon oil was used as the vapor-phase liquid enclosure. The qualitative observation of EHD flow patterns was conducted by an optical processing on computer tomography and the time-series of discharge current pulse generations at corona discharge electrode were measured simultaneously. These experimental results were analyzed in relationship between the EHD flow motions and the current pulse generations in synchronization. The current pulses and the EHD flow motions from the corona discharge electrode presented a continuous mode similar to the ionic wind in the fresh air and an intermittent mode. In the intermittent mode, the observed EHD flow motion was synchronized with the separated discharge pulse generations. From these experimental results, it was expected that the existence of silicon oil vapor trapped charges gave an occasion to the intermittent generations of the discharge pulses and the secondary EHD flow.
Databáze:	OpenAIRE
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