Simulation of Turbulent Hypersonic Flows

Abstract

Direct numerical simulations of turbulent reacting flows were performed to study the interaction between chemical heat release and turbulent fluid motion. A portion of the energy released by exothermic reactions is placed in the compressible mode of turbulent kinetic energy, with very little energy disposed to the incompressible mode. This process results in a positive feedback mechanism, whereby temperature fluctuations are amplified by the chemical reactions. In the case of endothermic reactions, the feedback is negative, resulting in decreased turbulent motion. The results of the simulations were used to develop a model for temperature fluctuations under conditions typical of a hypersonic boundary layer. This model has been validated and is suitable for use in the large eddy simulation of hypersonic turbulent boundary layers.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 31, 1997
Accession Number
ADA336140

Entities

People

  • Graham V. Candler

Organizations

  • University of Minnesota

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Chemical Reactions
  • Combustion
  • Computational Fluid Dynamics
  • Endothermic Reactions
  • Exothermic Reactions
  • Fluid Dynamics
  • Fluid Flow
  • Hypersonic Flow
  • Kinetic Energy
  • Large Eddy Simulation
  • Layers
  • Mechanics
  • Reynolds Number
  • Three Dimensional
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Control Systems Engineering.
  • Organic Chemistry

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Boundary Layers
  • Hypersonics - Hypersonic Flight