Stimulation of propellant burning by supplying electric energy in the flame


  • Andreasson Sten
  • Bemm Elisabeth
  • Skoglund Melker

Publish date: 2002-01-01

Report number: FOI-R--0640--SE

Pages: 32

Written in: Swedish


Experiments with the objective to stimulate the combustion of solid propellants by conducting an electric current through the reaction zone are reported. The current is conducted through the flame and will supply energy via resistive heating, which is added to the chemical energy release of the flame and thus increases the heat feedback to the unburnt propellant. The electric conductivity of the flame need to be increased in order to reduce random delay and to increase control of the electric discharge. Thermochemical calculations indicate that substantial increase in conductivity can be obtained by doping the propellants with compounds, provided that the flame temperature is high enough. The experiments are performed in a closed vessel where a propellant slab is pinched between two copper plates connected to a pulsed power supply. By suitable pulse forming the experimental results indicate that it is possible to stimulate the propellant burn rate by conducting an electric current through the flame.