Scope of Capacitive Methods in Solid Propellant Diagnostics
Ubaldo R. Carretta, R. Dondè, C. Guarnieri · Journal of Propulsion and Power · 1999
Apparatus for instantaneous regression rate measurements based on a simple plane-capacitor geometry and circuit theory is described, and results from a prototype setup are presented for both metallized and nonmetallized AP composite propellants at po 1 bar. The experiments show the apparatus is potentially effective as an instantaneous burning ratediagnostic only for the nonmetallized composite propellant. Formetallized propellants the technique offers potential as 1) a go/no-go technique and 2) a monitor for the onset of bulk activity inside the gaseous part of the e ame. Some tentative general conclusions about the applicability of electric e eld diagnostics for solid propellants are suggested.