Title :
Electrohydrodynamic instabilities in dielectric liquids induced by corona discharge
Author :
Pérez, Alberto T.
Author_Institution :
Dept. de Electron. y Electromagn., Seville Univ., Spain
Abstract :
Corona discharge from a needle is used to induce electrohydrodynamic (EHD) instabilities in a flat thin layer of dielectric liquid. We encounter two types of instabilities. The first one appears only for very insulating liquids and it is linked to the space charge induced in the liquid. This instability happens to be the classical EHD instability induced by unipolar injection. At higher voltages we observe a second instability in highly insulating liquids that is also observable for more conducting liquids. This second instability is due to the existence of a charged free surface
Keywords :
corona; dielectric liquids; electrohydrodynamics; flow instability; hydrodynamics; space charge; corona discharge; dielectric liquid; electrohydrodynamic instability; insulating liquid; needle; space charge; surface charge; unipolar injection; Conductivity; Corona; Dielectric liquids; Electrodes; Electrohydrodynamics; Needles; Petroleum; Space charge; Surface discharges; Voltage;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids, 1996, ICDL '96., 12th International Conference on
Conference_Location :
Roma
Print_ISBN :
0-7803-3560-0
DOI :
10.1109/ICDL.1996.565349
