Thermal studies of a heated cylinder placed near a plane surface
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Authors
Köseman, Ender
Subjects
Advisors
Cooper, Thomas E.
Date of Issue
1975-12
Date
December 1975
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Local and average Nusselt numbers have been experimentally determined around the circumference of a uniformly heated right circular cylinder placed near a plane surface in a cross flow of air. Experiments were carried out for Reynolds numbers ranging from 16,000 to 153,000, three plate lengths and varying cylinder to plate spacings. The variations of the
average Nusselt number as a function of gap spacing was found to exhibit an interesting and
unexpected trend. The average Nusselt number exhibited a minimum value when the cylinder was resting on the plate and attained a maximum value at a gap spacing of approximately one to two cylinder radii. Flow visualization studies together with measurements of the vortex shedding frequency in the cylinder wake indicate that when the plate is with in approximately one cylinder radius of the cylinder, it inhibits the formation of the regular vortex pattern that forms in the wake of a free cylinder. This has
a strong influence on the base Nusselt number which, in turn, exerts a controlling influence on
the magnitude of the average Nusselt number.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner