Large Eddy Simulations of Transverse Combustion Instability in a Multi-Element Injector

Abstract

Large Eddy Simulation (LES) is applied to study transverse combustion instability in a seven element combustor. The combustor is a self-excited linear array of seven elements. Different levels of instability are produced by changing which injectors flow fuel. Two configurations were analyzed, the most stable and the most unstable experimental configuration. The simulations showed different behavior for each case. For the unstable case, the simulated amplitudes were lower than the experimental, and there was nota well-defined transverse wave present in the combustor. Interestingly in this case the center element coupled with the first mode in the combustor and appeared to have a stabilizing effect. The amplitude of the simulated stable case was larger than the experimental, but showed evidence of a transverse instability.

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Document Details

Document Type
Technical Report
Publication Date
Jul 27, 2016
Accession Number
AD1014757

Entities

People

  • Douglas G. Talley
  • Matthew E. Harvazinski
  • Venkateswaran Sankaran
  • Yogin Desai

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Air Force Research Laboratories
  • Chemical Reactions
  • Combustion
  • Combustors
  • Computational Fluid Dynamics
  • Computational Science
  • Engines
  • Fluid Dynamics
  • Fluid Flow
  • High Pressure
  • Injectors
  • Large Eddy Simulation
  • Rocket Engines
  • Simulations
  • Transverse Waves
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computational Fluid Dynamics (CFD)
  • Internal Combustion Engine (ICE) Technology.