Augmented heat transfer for angled rib with intersecting rib in rectangular channels of different aspect ratios

Heeyoon Chung, Jun Su Park, Sehjin Park, Seok Min Choi, Hyung Hee Cho, Dong Ho Rhee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This study was an experimental investigation of the effect of an intersecting rib on heat/mass transfer performance in rectangular channels with angled ribs and different aspect ratios. In a rib-roughened channel with angled ribs, heat/mass transfer performance deteriorates as the channel aspect ratio increases, since the vortices induced by angled ribs diminish with increasing aspect ratio. A longitudinal rib that bisects the angled ribs is suggested to overcome this disadvantage. The heat transfer performance of angled rib configurations with a 60° attack angle were tested with and without an intersecting rib using naphthalene sublimation method. The channel aspect ratio is varied from 1 to 4. When the intersecting rib was present, additional vortices were generated at every point of intersection with the angled ribs. Thus the heat/mass transfer performance was significantly enhanced for all channel aspect ratios when an intersecting rib was added to an ordinary angled rib configuration.

Original languageEnglish
Title of host publicationHeat Transfer
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791845714
DOIs
Publication statusPublished - 2014
EventASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT 2014 - Dusseldorf, Germany
Duration: 2014 Jun 162014 Jun 20

Publication series

NameProceedings of the ASME Turbo Expo
Volume5A

Other

OtherASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT 2014
CountryGermany
CityDusseldorf
Period14/6/1614/6/20

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Chung, H., Park, J. S., Park, S., Choi, S. M., Cho, H. H., & Rhee, D. H. (2014). Augmented heat transfer for angled rib with intersecting rib in rectangular channels of different aspect ratios. In Heat Transfer (Proceedings of the ASME Turbo Expo; Vol. 5A). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT2014-26924