Turbulent Flame Stabilization Methods Using Confinement, Diluents, and High-Potential Electric Fields

Abstract

Presented are three methods in controlling flame stability and enhancing flame control. The three methods that were observed were flame confinement, flame dilution with inert diluents, and high-potential electric field effects on flames. Flames that were under full confinement experienced similar liftoff trends to that of the unconfined flames; however, flames that were semi-confined (confinement cylinder with viewing window open) behaved much more sporadically due to an increase in turbulent swirling. Liftoff delays were also present in both the semi-confined and fully confined cases, such that a higher jet velocity is required to achieve initial liftoff from the fuel nozzle. In diluting methane and ethylene flames with nitrogen and argon it was observed that methane flames are more sensitive to dilution than ethylene flames. Also, ethylene flames were not a function of diluent type unlike methane flames.

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Document Details

Document Type
Technical Report
Publication Date
Aug 03, 2014
Accession Number
ADA623534

Entities

People

  • Andrew R. Hutchins

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Combustion
  • Electric Fields
  • Equations
  • Far Field
  • Flames
  • Flow Rate
  • Fluids
  • Fuel Nozzles
  • Heat Transfer
  • Jet Flames
  • Measurement
  • Mechanical Engineering
  • Near Field
  • Reynolds Number
  • Turbulent Mixing
  • Voltage

Fields of Study

  • Physics

Readers

  • Materials Science.
  • Molecular Photonics/Laser Physics
  • Rocket Propulsion.