Forced-convective internal cooling of a horizontal equilateral-triangle cross-sectioned duct

C. W. Leung and S. D. Probert

Applied Energy, 1995, vol. 50, issue 4, 313-321

Abstract: An experimental determination of the steady-state forced convection from the internal surfaces of a horizontal, uniformly heated electrically, equilateral-triangle cross-sectioned duct with sharp corners has been undertaken. The average Nusselt number D, using the hydraulic diameter as the characteristic physical dimension, is a constant if the flow in the duct is laminar, but a function of the air's Reynolds number, when the flow is turbulent. Non-dimensional correlations, which can be used for predicting the value of the steady-state rate of convective heat transfer from such a triangular duct into the airflow, have been deduced, viz. D = 3·25 for laminar flows, i.e. ReD = 1450.

Date: 1995
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