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

Chun Wah Leung, S. D. Probert

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

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 NuD, 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. NuD= 3·25 for laminar flows, i.e. ReD< 1450; and NuD= 0·012 ReD0·83for turbulent flows, i.e. ReD≥ 1450.
Original languageEnglish
Pages (from-to)313-321
Number of pages9
JournalApplied Energy
Volume50
Issue number4
DOIs
Publication statusPublished - 1 Jan 1995

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Energy(all)

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