Model Of Corona Discharge Research Articles

Modeling of DC corona discharge along an electrically conductive flat plate with gas flow

The development of a corona discharge was evaluated numerically over a region of a semi-infinite flat plate having small (Ohmic) surface conductivity with a flowing gas. The model simulates a positive corona discharge (ionic wind) generated by two parallel wires mounted flush with the surface of the plate and directed with the free-stream gas flow. The deposition and removal of ions at the surface are permitted. Five coupled partial differential equations govern the gas phase model together with empirical equations for electrical discharge (/spl Phi/-I characteristics). Two voltage bias case studies were considered: first, the two electrodes have the same potential but are of opposite sign, and second, the positive electrode carries the full potential with the remaining electrode grounded. Several interesting effects relating to the voltage and current distributions, surface potential, and free-stream velocity are observed. Boundary layer development and surface shear are also discussed.

?Bunched? model of corona discharge in a gas-dynamical flow

In the present paper, a theoretical model of corona discharge is proposed for the case when electric charge transport is implemented by means of the motion of discrete charged bunches of finite dimensions. A system of equations and boundary conditions is formulated for the study of unsteady cyclic processes in a corona discharge. The electric field induced by the space charge of bunches and the presence of an external electric circuit are taken into account. A solution of the formulated system of equations for corona discharge with spherical geometry is obtained. The integrated (current-voltage) characteristics and the amplitude-frequency characteristics of the corona discharge are found. The proposed theory is generalized to the case of a corona discharge in a moving gas. The unsteady characteristics of corona discharge with spherical geometry for gas motion in a radial direction are found.