Example Problems in LES Combustion

Abstract

This memorandum provides a brief introduction to finite rate chemistry in the framework of large eddy simulation for compressible flow fields. Particular emphasis is placed upon the filtered reaction rate expression through the use turbulent chemical closure terms. The Eddy Break-Up model is an example of this type of closure term. Within the multiphase physics computer code LESLIE3D, these algorithms are tested on a gas phase acetylene combustion problem and on a shock wave initiated droplet evaporation and combustion problem. Results are shown for each problem. Comparisons are shown for kinetic and Eddy Break-Up model filtered reaction rates. For the droplet problem, droplet evaporation, combustion and product formation is demonstrated.

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Document Details

Document Type
Technical Report
Publication Date
Sep 26, 2016
Accession Number
AD1018288

Entities

People

  • Douglas V. Nance

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Alkanes
  • Alkynes
  • Chemical Kinetics
  • Chemical Reactions
  • Chemical Synthesis
  • Chemistry
  • Combustion
  • Computational Fluid Dynamics
  • Computer Programming
  • Computer Programs
  • Computers
  • Cyclic Hydrocarbons
  • Hydrocarbon Fuels
  • Large Eddy Simulation
  • Organic Chemistry
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Combustion science or combustion engineering.
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers