Factors influencing maximum ionic wind velocities

Abstract

The purpose of this work is to investigate the influence of gauze parameters, applied magnetic fields, and mixture inhomogeneity on the ionic wind velocities that can be achieved by applying electric fields to ion sources in gases, the emphasis being on combustion systems. The principal conclusions are as-follows:(a)The flows through gauzes are limited to about 80% of the theoretical maximum by a combination of early breakdown and pressure drop through the gauze.(b)Under suitable circumstances, large applied magnetic fields can bring about large increases in the wind velocity as limited by breakdown.(c)The effect of mixture inhomogeneities (e.g., hot and cold gas pockets) can be readily accounted for when calculating wind velocity as a function of ion current density. © 1971 The Combustion Institute All rights reserved.