A Parametric Analysis of a Coupled Chemistry-Radiation Model in Porous Media

Abstract

A one-dimensional coupled chemistry-radiation model (ChemRad) for predicting combustion and heat transfer characteristics in a single and multi-layered porous media is presented. The model allows detailed gas and surface chemical kinetics mechanisms to be incorporated, and uses a two-flux radiation approximation in the energy equation. A stoichiometric propane/air mixture burning in a thin with mesh burner has been modelled using a well-documented high-temperature propane kinetics scheme with 40 reactive species and 93 reactions. A systematic analysis of the solution's sensitivity to variations in input parameters, particularly the optical characteristics of the media, has been performed and influential parameters have been identified. It has been found that the dornant factors that influence the solution, in order of significance are the area density, voidage and reflectivity of the porous material, and the ratio of forward-to-backward scattering of radiation.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2000
Accession Number
ADA388277

Entities

People

  • Farid C. Christo

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Kinetics
  • Chemical Reactions
  • Chemistry
  • Combustion
  • Energy
  • Engineering
  • Equations
  • Heat Transfer
  • Heat Transfer Coefficients
  • Materials
  • Optical Properties
  • Parametric Analysis
  • Physical Properties
  • Porous Materials
  • Surface Chemistry
  • Thermal Conductivity
  • Thermal Radiation

Readers

  • Combustion science or combustion engineering.
  • Nanocomposite Materials Science
  • Spectroscopy.