Creeping Flame Spread Along Fuel Cylinders in Forced and Natural Flows and Microgravity

Abstract

Semianalytical expressions are developed for creeping flame spread parallel to a fuel cylinder axis so that spread rates measured or predicted for flat surfaces over the same material can be directly used for cylindrical surfaces. Two phenomena are identified that cause an increased flame spread rate in the cylindrical over the flat surface geometry: (1) increased heat transfer from the gas phase and (2) faster temperature increase of the solid phase. Analytical expressions from approximate solution to a conserved scalar equation are developed for the flame spread rate by simplifying the flowfield using an Oseen approximation for the opposing flow.

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Document Details

Document Type
Technical Report
Publication Date
Aug 04, 2000
Accession Number
ADA453277

Entities

People

  • Kurt Sacksteder
  • Lin Tang
  • Matthew F. Bundy
  • Michael A. Delichatsios
  • Robert A. Altenkirch
  • Subrata Bhattacharjee

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Coefficients
  • Combustion
  • Convection
  • Curvature
  • Energy
  • Engineering
  • Equations
  • Flow
  • Geometry
  • Heat Energy
  • Heat Flux
  • Heat Transfer
  • Heat Transfer Coefficients
  • Leading Edges
  • Payload
  • Thermal Diffusivity

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Fluid Dynamics.