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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

TURBULENT MIXED CONVECTION HEAT TRANSFER IN AN INCLINED FLAT CHANNELWITH OPPOSING FLOWS

Get access (open in a dialog) DOI: 10.1615/IHTC12.3760
6 pages

摘要

In this paper we present the results on experimental investigation of the local turbulent mixed convection heat transfer in an inclined( φ = 30°, 60°) flat channel with opposing flows. The experiments were performed in air flow of different pressure, from 0.2 - 0.8 MPa, in the range of Re from 4 103 to 4 104 and Grq up to 1.4 1010 for one side heating (upper wall). Analysis of the results was performed using buoyancy parameter Bo = Grq/RemPrn as it is commonly used in the analysis of the mixed convection. This allowed defining the characteristic buoyancy parameter for opposing flows and to compare it with parameters used for aiding flows in vertical tubes. Analysis also revealed that in most cases Nu number along the channel is decreasing smoothly. But under the large effect of buoyancy heat transfer variation along the channel can be different. General correlation for computation of heat transfer rate in inclined flat channels was suggested.