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ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

RADIAL DISTRIBUTION OF CONVECTIVE HEAT TRANSFER COEFFICIENT BETWEEN AN AXISYMMETRIC TURBULENT JET AND A FLAT PLATE HELD NORMAL TO THE FLOW

Get access (open in a dialog) DOI: 10.1615/IHTC6.1380
pages 297-303

Resumo

This paper describes the application of an electrolytic mass transfer technique to the determiniation of heat transfer rates between an axisymmetric turbulent jet and a plate held normal to the flow. The experimental method involved diffusion-controlled electrolysis in a cell in which the electrolyte comprised equi-molar concentrations of potassium ferri and ferrocyanide in sodium hydroxide solution. This method has already found wide application for the determination of wall fluxes in high Schmidt number flows and is particularly attractive because of the ease with which results of adequate precision may be obtained.

In the present work, the radial distribution of convective heat transfer coefficients from the stagnation point to the fully developed wall jet region on the plate was studied for a range of Reynolds numbers between 3,880 and 23,000 and for nozzle to plate distances in the range 5 to 20 nozzle diameters.

It is shown that the values of heat transfer coefficients deduced from the current mass transfer experiments may be used with a similar degree of confidence for engineering design as those obtained directly from the results of heat transfer experiments.