Simple model of thermal emission from burning aluminum in solid propellants

J. Harrison, M. Q. Brewster

Research output: Contribution to journalArticle

Abstract

A simple mathematical model of thermal emission from burning aluminum in solid propellants was proposed, useful in situations as aluminized-propellant flowfield modeling thereby including computational fluid dynamics (CFD) modeling. The model proposed is based on the assumption of uniform, diffuse radiosity (UDR) applied separately to each part of the burning droplet, metal and oxide cap. The experiment defined number of relations to determine the droplet emissivity for a given droplet diameter and cap thickness. The described model of radiant emission from burning aluminum is considered to possess strength, weakness, advantages and disadvantages, that are particularly related to uncertainty and variations in droplet temperature and the chemical reducing of the environmental gases. The study revealed that the overall burning-droplet model is targeted for atmospheric pressure in typical propellant combustion gases necessary to extend the model to higher pressures.

Original languageEnglish (US)
Pages (from-to)630-634
Number of pages5
JournalJournal of thermophysics and heat transfer
Volume23
Issue number3
DOIs
StatePublished - 2009

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Space and Planetary Science

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