Large Eddy Simulations of Supercritical Mixing Layers Based on Subgrid Scale Models Extracted From Direct Numerical Simulations

Abstract

The objective of this study is the fundamental understanding of fuel disintegration and mixing in a supercritical environment (relative to the fuel) in order to determine parameter regimes advantageous to mixing. The approach is based on the future goal of developing a model for a supercritical, turbulent jet mixing with surrounding fluid. The method is one that combines the modeling of supercritical fluids with a systematic development based on the Large Eddy Simulation (LES) approach. This systematic development includes a consistent protocol based upon Direct Numerical Simulations (DNS) for developing a Subgrid Scale (SGS) Model appropriate to supercritical fluids, rather than choosing in an ad hoc manner an existing SGS model developed under assumptions inconsistent with supercritical fluid behavior. This SGS model should be used in future studies of supercritical turbulent jets utilizing the LES methodology.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2006
Accession Number
ADP023634

Entities

People

  • Josette Bellan

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Coefficients
  • Databases
  • Equations
  • Filters
  • Heat Flux
  • High Density
  • Jet Propulsion
  • Large Eddy Simulation
  • Military Research
  • Models
  • Payload
  • Pressure Gradients
  • Scale Models
  • Scientific Research
  • Simulations
  • Technical Information Centers

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Computational Fluid Dynamics (CFD)