THE SURFACE TEMPERATURE OF AMMONIUM PERCHLORATE BURNING AT ELEVATED PRESSURES

Abstract

Measurements of the burning-surface temperatures of fuel-weak ammonium perchlorate/paraformaldehyde mixtures have been made up to pressures of 300 psia, using an infrared emission technique. Temperature determinations up to 60 psia were reasonably reproducible, the values being compatible with the existence, at the surface, of an equilibrium between solid ammonium perchlorate and the gaseous decomposition products, NH3 and HC1O4. Results above 60 psia were rather erratic, and failure to eliminate the variations by experiment led to an examination of the natural limitations of the optical method for measuring the surface temperatures of fast-burning compositions. The temperature gradients within the solid became too steep even for this method, which can 'see' as little as 2 microns of surface depth.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1966
Accession Number
AD0637771

Entities

People

  • J. Powling
  • W. A. Smith

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Ammonium Perchlorate
  • Barometric Pressure
  • Burning Rate
  • Chemical Reaction Properties
  • Combustion
  • Combustion Chambers
  • Composite Propellants
  • Exothermic Reactions
  • High Pressure
  • Ignition
  • Measurement
  • Particle Size
  • Perchlorates
  • Propellants
  • Solid Propellants
  • Surface Temperature
  • Temperature Gradients

Readers

  • Combustion science or combustion engineering.
  • Rocket Propulsion.
  • Spectroscopy.