Hydrodynamics and heat transfer during the flow of a laminar impinging jet on a catalytic surface
V.V. Lukashov, V.V. Lemanov, A.V. Tupikin, V.A. Fedorenko, K.A. Sharov
Kutateladze Institute of Thermophysics, SB RAS, Novosibirsk, Russia
Keywords: impinging jet, catalytic surface, heat transfer, heat flux density, temperature distribution over the surface
Abstract
The investigation results on a study of the effect of catalytic oxidation of hydrogen on heat transfer in an impinging jet under chemical activity on the sample surface. It is shown that with an increase in the percentage of hydrogen in the mixture with air, not only an increase in the heat transfer intensity is observed, but also the reaction zone expansion. It is also noted that in the case of a chemically active jet, there are temperature pulsations on the surface (approximately 6%) associated with the reactions of hydrogen catalytic oxidation. At that, the type of dependence of the distribution of the generalized temperature function on the radius on the surface is almost the same for all versions with heterogeneous chemical reactions. An exception is the case with a molar content of hydrogen of 2% in the jet, when there are areas with the value of heat release from reactions below heat transfer during convective heat transfer with a non-reacting flow.
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