Three-Dimensional Wall Effects of a Scramjet Cavity Flameholder

Abstract

Scramjets, or supersonic combustion ramjets, are a key component for the development of long duration hypersonic vehicles. A novel optical observation technique called hyperspectral imaging has been developed to examine a scramjet combustion chamber. The hyperspectral camera is capable of generating an interferogram at hundreds to thousands of wavelengths. These data are integrated across the line-of-sight with no information on three-dimensional location. A model must be used to translate this data to three dimensions. With no a priori data to inform otherwise, the current model assumes that the scramjet is two-dimensional in nature. This does not agree with understanding of compressible flow theory of shock dominated and turbulent flows. This work simulates a non-reacting scramjet combustor using hybrid RANS/LES. The spanwise character is analyzed through instantaneous and time-averaged statistics.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 28, 2018
Accession Number
AD1063520

Entities

People

  • Evan P. Oren

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Buoyancy
  • Combustion
  • Computational Fluid Dynamics
  • Energy Transfer
  • Fluid Dynamics
  • Fluid Flow
  • Froude Number
  • Hypersonic Vehicles
  • Large Eddy Simulation
  • Measurement
  • Mechanical Properties
  • Spectroscopy
  • Stratified Fluids
  • Three Dimensional
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Computer Vision.
  • Fluid Mechanics and Fluid Dynamics.
  • Rocket Propulsion.

Technology Areas

  • Hypersonics