A Computational Study of Transverse Combustion Instability Mechanisms

Abstract

Computational fluid dynamics simulations are used to study spontaneous combustion instabilities in a rectangular chamber that contains seven coaxial injector elements. The simulation predicts self-excited transverse oscillations that have variable amplitudes, similar to what is seen in a companion experiment. Several processes are identified in the simulation that may promote the rise of instability by increased heat release during a local compression, including the interaction between vortices shed from adjacent injectors and interactions between flames and the combustor walls.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2014
Accession Number
ADA615844

Entities

People

  • Kevin J. Shipley
  • Matthew E. Harvazinski
  • Venkateswaran Sankaran
  • William E Anderson

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Waves
  • Acoustics
  • Air Force Research Laboratories
  • Boundary Layer
  • Chambers
  • Combustion
  • Combustion Chambers
  • Combustors
  • Computational Fluid Dynamics
  • Dynamics
  • Engines
  • Fluid Dynamics
  • Fluid Flow
  • Ignition
  • Injectors
  • Large Eddy Simulation
  • Physics Laboratories

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Fluid Mechanics and Fluid Dynamics.
  • Plasma Physics / Magnetohydrodynamics