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International Heat Transfer Conference 6

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

NATURAL CONVECTION HEAT TRANSFER FROM A VERTICAL PLATE TO SUPERCRITICAL HELIUM

V. I. Deev
Moscow Engineering and Physics Institute (State University), Moscow

A. K. Kondratenko
Moscow Engineering Physics Institute

V. I. Petrovichev
Moscow Engineering Phyisics Institute

V. E. Keilin
I. V. Kurchatov Atomic Energy Institute, Moscow

I. A. Kovalev
I. V. Kurchatov Atomic Energy Institute, Moscow

DOI: 10.1615/IHTC6.3180
pages 205-209

Abstract

The results of an experimental study of natural convection heat transfer to helium on a vertical copper plate of 30 mm height are presented. The experiments were performed in a pressure interval (2.33−4.56)×105 N/m2, heat Load 60−5000 W/m2 bulk helium temperatures from 4.5 K to 6−10 K, temperature differences 0.07−23 K. The Rayleigh numbers varied from 1010 to 1014. A considerable discrepancy between the experimental data on the average heat transfer coefficients, on the one hand, and the values calculated by the equation for carbon dioxide and water at supercritical pressures, on the other, has been obtained. A modified criterion equation was found to correlate with an accuracy of ± 20% the results of the present work, as well as those of Klipping and Kutzner for the natural convection of supercritical helium on a horizontal cylinder in the interval of Rayleigh numbers from 107 to 1014.

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