Detailed measurement of heat/mass transfer with continuous and multiple V-shaped ribs in rectangular channel

Dong Hyun Lee, Dong-Ho Rhee, Kyung Min Kim, Hyung Hee Cho and Hee Koo Moon

Energy, 2009, vol. 34, issue 11, 1770-1778

Abstract: Effects of aspect ratio on heat/mass transfer were investigated in rectangular channels with two different V-shaped rib configurations, which are continuous V-shaped rib configuration with a 60° attack angle, and multiple (staggered) V-shaped rib configuration with a 45° attack angle. The square ribs were attached on the test section in a parallel manner. A naphthalene sublimation method was used to measure the local heat/mass transfer coefficients. For the continuous V-shaped rib configuration, two pairs of counter-rotating vortices were generated in the channel, and high transfer region was formed at the center of the ribbed walls. However, for the multiple V-shaped rib configuration with 45° attack angle, asymmetric secondary flow patterns were generated due to its geometric features, resulting in uniform heat/mass transfer distributions. The effect of channel aspect ratio was more significant for the continuous 60° V-shaped rib than for the multiple 45° V-shaped rib configuration.

Keywords: Internal passage cooling; Channel aspect ratios; Rib turbulators; Naphthalene sublimation technique (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (16)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:34:y:2009:i:11:p:1770-1778

DOI: 10.1016/j.energy.2009.07.011

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