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Heat Transfer Research
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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v37.i1.60
pages 77-84

Experimental Investigation of a Diffusion Thermoeffect in a Boundary Layer During Helium Injection into Air

E. P. Volchkov
S. S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
V. P. Lebedev
S. S. Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
V. V. Lukashov
S. S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

ABSTRAKT

It has been established experimentally that in helium injection through a permeable wall into an air flow of the same temperature the heating of the wall up to about 8°C is observed. On the other hand, in the outer part of the boundary layer the flow is cooled. Such a structure of the thermal boundary layer is caused by redistribution of heat in the boundary layer due to the diffusion thermoeffect (Dufour effect). The magnitude of the thermal effect on the wall is preserved in transition from a laminar to a turbulent mode of flow.


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