Abstract
A fluid flow mapper is used as equipment to make potential flow visibly. The authors have been visualized the lines of electric force in two dimensional electrostatic fields by means of the fluid flow mapper. Space charge distributions in electric fields having an axisymmetric property are simulated by a fixed sand-bed which behaves as distributed sources or sinks in the fluid flow mapper. In this paper, the fluid flow mapper is applied ito visualize and analyze axisymmetric three dimensional fields with space charges formed n a needle-plane electrode system used in dielectric breakdown tests. Furthermore, this paper describes the method analyzing space charge densities from the experimental results of flow patterns.
