Scaling relations for the geometry of wire-to-airfoil atmospheric ionic thrusters

Abstract

This work presents a multiparameter experimental investigation on the effects of geometrical parameters on the performance of corona thrusters. A scaling model is presented in order to define physically consistent reference values and dimensionless coefficients that describe the main performance indicators. Airfoil collectors of different thickness and chord are tested in a parallel array configuration at different spacings, gaps and voltages. Direct thrust and electrical measurements are performed and used to determine the dimensionless coefficients. The results identify scaling relations and indicate that collectors with short chord and adequate thickness maximize, within the investigated parameter space, the performance parameters.