Thermal characteristics of a premixed impinging circular laminar-flame jet with induced swirl

X. Q. Huang, C. W. Leung, C. K. Chan, S. D. Probert

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54 Citations (Scopus)


A swirling flow has been induced in a premixed gas-fired impinging circular flame jet by adding two tangential air flows to the main axial air/fuel flow. The flame jet system was considered to be small-scale and operated under low-pressure, laminar flow conditions. The effects of Reynolds number of the air/butane mixture and nozzle-to-plate distance on the heating performance of the flame were studied and compared with the heat-flux distributions on an impingement plate under different operating conditions. The whole investigation was conducted under the stoichiometric air/fuel condition (i.e., equivalence ratio, Φ = 1) with the Reynolds number being varied from 800 to 1700, and nozzle-to-plate distance being selected between 1.5 and 4.0. The introduction of swirl to small-scale, low-pressure, laminar premixed gas-fired impinging circular flame jets is the method for enhancing their thermal performances. The heat-flux distribution on the impingement plate was more uniform and the flame temperatures essentially higher when compared with a similar flame jet system without induced swirl.

Original languageEnglish
Pages (from-to)401-411
Number of pages11
JournalApplied Energy
Issue number4
Publication statusPublished - Apr 2006


  • Impinging circular flame jet
  • Induced swirl
  • Premixed air/butane combustion
  • Thermal characteristics


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