Plasma-Propellant Interaction Studies
Abstract
This report describes research focused on the interactions between a plasma and a solid propellant. The specific issues addressed include the effects of radical and neutral species as well as radiative heat transfer on the ignition and combustion of double-base propellants. A wide variety of measurements have been conducted using a broad range of diagnostic tools, such as a triple-quadrupole mass spectrometer, special heat flux gages, high-speed cameras, as well as SEM and X-ray facilities. Species measurements show that both neutrals/radicals and ions from the capillary arrive at the propellant surface and provide a pool of species that readily interact with pyrolysis products from the propellant. It is also evident that metal particles from trigger wire and nozzle arrive at the propellant surface to enhance the pyrolysis. The magnitudes of the radiative heat transfer are extremely high and depend on the capillary and trigger wire material used. The radiation produces measurable pyrolysis and in-depth heating of transparent JA2. The ultra-violet component is very strong, but it is believed to inhibit ignition when the propellant is directly exposed to the plasma. The pyrolysis species, including NO2, N2O, HONO and aldehydes are uv-photolyzed, to produce CO, CO2, NO and CH4.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 20, 2007
- Accession Number
- ADA482372
Entities
People
- Stefan T. Thynell
- Thomas A. Litzinger
Organizations
- Pennsylvania State University