Spray Combustion Modeling Including Detailed Chemistry

Abstract

SUMMARY AND CONCLUSIONS: LOX/H2 spray flames in the counter-flow configuration have been studied, and the gaseous oxygen profile shows a non-monotonic behavior because of the high reactivity of the system. The flames persist to strain rates up to 25,000/s, and extinction has not yet been found. Multiple structures of laminar methanol/air counter-flowing spray flames have been identified at low strain rates up to 400/s on the spray side of the configuration for the present conditions. The gas-sided spray flame shows the same inner structure as a pure gas flamelet with appropriate boundary conditions, and this simplifies the implementation of the flamelet model for turbulent spray diffusion flames. The assumed beta-function for the turbulent mixing in spray flames is poor in regions where vaporization exists, and it has been replaced by a PDF transport equation for the mixture fraction. A modified beta-function is suitable to predict the shape of the PDF of the mixture fraction.

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Document Details

Document Type
Technical Report
Publication Date
Jun 22, 2004
Accession Number
ADA446454

Entities

People

  • Eva Gutheil

Organizations

  • Heidelberg University

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Alcohols
  • Barometric Pressure
  • Boltzmann Equation
  • Chemical Reactions
  • Chemistry
  • Combustion
  • Computational Fluid Dynamics
  • Equations
  • Exothermic Reactions
  • Fluid Dynamics
  • Liquid Oxygen
  • Mathematical Models
  • Physical Properties
  • Reaction Mechanisms
  • Simulations
  • Strain Rate
  • Two Dimensional

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.
  • Rocket Propulsion.