A Contribution to the Flat Flame Olympics: Problem B.

Abstract

This report discusses in detail the input parameters used in computing flame speeds and profiles for the stoichiometric hydrogen-air premixed, steady-state, laminar flame. The input kinetics were specified. OUr solution was obtained by use of a relaxation technique. The partial differential equations were solved using a finite element method, PDECOL. A special algorithm that enabled spatial grid points to be placed in the flame front was used. Results include: (1)information requested by the workshop that deals with specific transport parameters, (2) computed flame speeds, (3) mass fraction peak values of radical species profiles, and (4) the extrema of the enthalpy profile. We also consider the likely sources of our computed HO2 'spike' and OH double peak. We also found features in the N2 and O2 mole fraction profiles that are due simply to the mass-to-mole fraction transformation. Finally, we have compared the flame speeds, radical peaks, and enthalpy extrema when two quite different transport mixing algorithms were used.(etc.)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1982
Accession Number
ADA119401

Entities

People

  • Joseph M. Heimerl

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemical Engineering
  • Chemical Reactions
  • Chemistry
  • Combustion
  • Diffusion Coefficient
  • Engineering
  • Equations
  • Heat Capacity
  • Mechanical Engineering
  • Metacentric Height
  • Military Research
  • Payload
  • Specific Heat
  • Steady State
  • Thermal Conductivity
  • Thermal Diffusion
  • Transport Properties

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Combustion science or combustion engineering.
  • Fluid Mechanics and Fluid Dynamics.