Experimental Studies of Turbulent Premixed Flames in Compressible Flows

Abstract

An experimental study of flame kernel ignition and propagation in compressible flow is undertaken to understand whether classical low-speed flame speed models are valid in supersonic flows. Flame kernel are laser ignited and tracked in anisotropic premixed turbulence in a channel for Mach numbers from 1.5-2.0. OH-LIF and PIV is used to investigate flame propagation characteristics. Filtered Rayleigh Scattering technique is also developed and issues for its use in supersonic flow are identified. It is shown that the flame kernal grows and propagates in supersonic flow. A refinement to the flame speed scaling is suggested using a combination of experimental results and supporting numerical simulations.

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Document Details

Document Type
Technical Report
Publication Date
Oct 29, 2019
Accession Number
AD1096641

Entities

People

  • Robert Pitz
  • Suresh Menon

Organizations

  • Georgia Tech Research Corporation

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Boundary Layer
  • Combustion
  • Computational Fluid Dynamics
  • Detectors
  • Dye Lasers
  • Fluid Dynamics
  • Ignition
  • Laser Beams
  • Laser Induced Fluorescence
  • Lasers
  • Light Sources
  • Measurement
  • Mie Scattering
  • Pressure Measurement
  • Two Dimensional
  • Waveplates

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Directed Energy
  • Hypersonics