EQUILIBRIUM STRUCTURE OF THIN DIFFUSION FLAME ZONE

Abstract

The method of inner-and-outer expansions was used to analyze the initial broadening of a diffusion flame sheet caused by the nonvanishing equilibrium constant. Analytic expressions are derived for the thickness of the flame zone, and the position and the value of the maximum flame temperature. The thickness of the flame zone created by the nonvanishing equilibrium constant is found to be less than that created by the decreasing Damkohler number studied previously. Varying the stoichiometric coefficient of the fuel is found to affect the oxidant side of the flow to a greater degree than the fuel side itself, and vice versa. The problem of nonvanishing equilibrium constant is important when a fuel is injected into a hypersonic stream and the high energy of the stream begins to prevent the full release of the heat of combustion.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1965
Accession Number
AD0477791

Entities

People

  • Paul M. Chung
  • Victor D. Blankenship

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Applied Mechanics
  • Boundaries
  • Boundary Value Problems
  • Coefficients
  • Combustion
  • Combustion Products
  • Equations
  • Geometry
  • Mechanics
  • Molecular Weight
  • Numerical Analysis
  • Perturbations
  • Physics
  • Thickness
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Fluid Dynamics.

Technology Areas

  • Hypersonics