On the flame height of circulation-controlled firewhirls with variable density

Dehai Yu, Peng Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


A theoretical analysis on the flame height of circulation-controlled firewhirls was performed with an emphasis on evaluating the influence of variable density. A circulation-controlled firewhirl was approximated as a non-premixed flame with variable density and temperature-dependent diffusivities in a steady and axisymmetric Burgers vortex. A coupling-function-based formulation is considered to describe the firewhirl by invoking the assumption of unity Lewis number. The variable density effect in enhancing the flame height was characterized by a dimensionless temperature factor multiplied to the linear relation. For the firewhirls supplied by a fuel in condensed phase the boundary conditions at the fuel surface were specified by considering the physical mechanism of Stefan flow.
Original languageEnglish
Pages (from-to)3097-3104
Number of pages8
JournalProceedings of the Combustion Institute
Issue number2
Publication statusPublished - 1 Jan 2017


  • Burgers vortex
  • Coupling function
  • Firewhirl
  • Flame height
  • Variable density

ASJC Scopus subject areas

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


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