On formation of a stagnation zone in the flow between conical flame and flat obstacle

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Abstract

The structure of a jet flow formed by the combustion products of conical propane-air flame and impinging onto a normally oriented flat cooled surface is studied experimentally. The velocity field is measured by the particle image velocimetry technique. Based on the non-intrusive measurements, formation of a recirculation zone in the flow between the flame cone and surface has been detected for the first time. Mechanism for the observed phenomenon is proposed. Presence of the low-intensity recirculation bubble on the jet axis can explain the effect of a heat transfer decrease near the stagnation point on the surface, observed in the previous studies.

Original languageEnglish
Pages (from-to)317-320
Number of pages4
JournalThermophysics and Aeromechanics
Volume25
Issue number2
DOIs
Publication statusPublished - 1 Mar 2018

Keywords

  • convective heat transfer
  • impinging jet

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