Propagation velocities for neighboring triple flames

Stephen W. Grib, Michael W. Renfro

Research output: Contribution to conferencePaperpeer-review


Triple flames propagate through mixtures faster than the laminar flame speed due to streamline divergence ahead of the flame base. When multiple triple flames are in close proximity, the bulk propagation velocity of the structure can be even faster due to additional streamline divergence. Practical turbulent flames in partially-premixed conditions encounter these situations, where multiple stoichiometric crossing are in close proximity, leading to multiple triple flames being formed. Individual triple flame propagation velocities has been characterized in previous studies, however similar characterization of neighboring triple flames velocities has not been conducted. The present work utilizes a laminar five slot burner, which allows both the concentration gradients and stoichiometric separation distance of two interacting triple flames to be varied. The bulk propagation velocity has been characterized based on distance between the flame base (or stoichiometric) locations and curvatures in order to better understand the conditions which lead to larger streamline divergence. Hydroxyl planar laser induced fluorescence and particle image velocimetry were used to obtain both flame curvature and velocity information.

Original languageEnglish
StatePublished - 2017
Event10th U.S. National Combustion Meeting - College Park, United States
Duration: Apr 23 2017Apr 26 2017


Conference10th U.S. National Combustion Meeting
Country/TerritoryUnited States
CityCollege Park

Bibliographical note

Publisher Copyright:
© 2017 Eastern States Section of the Combustion Institute. All rights reserved.


  • Laminar Flames
  • Propagation velocity
  • Triple flames

ASJC Scopus subject areas

  • General Chemical Engineering
  • Physical and Theoretical Chemistry
  • Mechanical Engineering


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