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

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, format...

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Bibliographic Details
Published in:Thermophysics and aeromechanics 2018-03, Vol.25 (2), p.317-320
Main Authors: Kravtsov, Z. D., Tolstoguzov, R. V., Chikishev, L. M., Dulin, V. M.
Format: Article
Language:English
Subjects:
Brief Communication
Combustion products
Conical flow
Jet flow
Particle image velocimetry
Physics
Physics and Astronomy
Stagnation point
Thermodynamics
Velocity distribution
Velocity measurement
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Summary: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.
ISSN:0869-8643
1531-8699
DOI:10.1134/S0869864318020178