Local heat transfer in rotating smooth and ribbed two-pass square channels with three channel orientations

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Journal of Heat Transfer

DOI:https://doi.org/10.1115/1.2822671· OSTI ID:381788

Dutta, S ^[1]; Han, J C ^[2]

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1. Univ. of South Carolina, Columbia, SC (United States)
2. Texas A&M Univ., College Station, TX (United States)

This paper presents experimental heat transfer results in a two-pass square channel with smooth and ribbed surfaces. The ribs are placed in a staggered half-V fashion with the rotation orthogonal to the channel axis. The channel orientation varies with respect to the rotation plane. A change in the channel orientation about the rotating frame causes a change in the secondary flow structure and associated flow and turbulence distribution. Consequently, the heat transfer coefficient from the individual surfaces of the two-pass square channel changes. The effects of rotation number on local Nusselt number ratio distributions are presented. Heat transfer coefficients with ribbed surfaces show different characteristics in rotation number dependency from those with smooth surfaces. Results show that staggered half-V ribs mostly have higher heat transfer coefficients than those with 90 and 60 deg continuous ribs. 16 refs., 10 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 381788
• Journal Information: Journal of Heat Transfer, Journal Name: Journal of Heat Transfer Journal Issue: 3 Vol. 118; ISSN 0022-1481; ISSN JHTRAO
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
COOLING
DESIGN
DUCTS
HEAT TRANSFER
NUSSELT NUMBER
SURFACES
TURBINE BLADES