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International Heat Transfer Conference 8

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

EFFICIENCY OF GASEOUS FILM COOLING OF A SURFACE IN A FLOW WITH TURBULIZATION

Samson Semenovich Kutateladze
Thermal Physics Institute, Siberian Division of the USSR Academy of Sciences, Novosibirsk

B. P. Mironov
Institute of Thermophysics, Siberian Branch of the USSR Academy of Sciences, 630090 Novosibirsk

Victor N. Vasechkin
Institute of Thermophysics, Siberian Branch of the USSR Academy of Sciences, 630090 Novosibirsk USSR

Nadezhda I. Yarygina
S. S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

DOI: 10.1615/IHTC8.2200
pages 1277-1283

要約

The paper reports results of a study on porous and slot film coolings created on a flat plate with two turbulence levels of the free stream: 0.2% and 10%.
The experiments have allowed us to find out that turbulization of the external flow deteriorates the efficiency of both types of film cooling, the porous one being deteriorated more essentially. An increase in a blow section with a given flow rate of the coolant causes a decrease in the efficiency of the porous film cooling. In this case the stronger influence of the blow-section length manifests itself when the turbulence of the external flow is high.

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