- Shaughnessy, E.J. and Solomon, G.S., Electrohydrodynamic pressure of the point-to-plane corona discharge,
Aerosol Science and Technology, vol. 14 no. 2
pp. 193 - 200 .
(last updated on 2007/04/06)
In this article, we discuss the electrohydrodynamics of the point-to-plane discharge, which is geometrically somewhat simpler than the wire-plate electrode arrangement. Our interest was stimulated by shadowgraph studies by Solomon (1983) in air which employed currents and point-to-plane spacings much larger than those used by Chattock (1899). These shadowgraphs show a very stable laminar corona wind jet whose radius is comparable to the radius of curvature of the point itself, and thus much narrower than the radius of the current density distribution in the far field. In the experiments reported here, the hydrodynamic variable of interest is the static pressure on the plane at the point of intersection of the axis of a sharp needle. This pressure is much easier to measure than the velocity field, yet provides a means of estimating the maximum gas speed which might occur in the jet. The experimental results also include current-voltage (I-V) data and thus provide a very simple test case for future numerical and analytical models of this electrohydrodynamics problem.
Electrohydrodynamics;Pressure Measurement;Electric Measurements;