On formation of a stagnation zone in the flow between conical flame and flat obstacle
Z.D. Kravtsov1,2, R.V. Tolstoguzov1,2, L.M. Chikishev1,2, and V.M. Dulin1,2
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
E-mail: vmd@itp.nsc.ru
Keywords: impinging jet, convective heat transfer
Pages: 317–320
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.
DOI: 10.1134/S0869864318020178
|
