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Thermal studies of a heated cylinder placed near a plane surface

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Author
Köseman, Ender
Date
1975-12
Advisor
Cooper, Thomas E.
Second Reader
Fuhs, Allen E.
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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.
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http://hdl.handle.net/10945/21090
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    The convective heat transfer behavior of a heated cylinder located near a plane surface 

    Gnerlich, Charles Henry (Monterey, California. Naval Postgraduate School, 1975-06);
    An experimental apparatus which will allow the study of the influence of ground effects on a heated cylinder placed in a crossflow of air was designed and constructed. The effects of a wall on the heat transfer characteristics ...
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    Local heat transfer coefficients around a cylinder in oscillating flow 

    Brunson, Fred W. (Monterey, California. Naval Postgraduate School, 1981-12);
    Local and average heat transfer coefficients were determined for a right circular cylinder in an oscillating flow. Spanwise platinum heater strips were used to heat the cylinder isothermally over the lower 180 degrees ...
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    The drag and lift characteristics of a cylinder placed near a plane surface 

    Geöktun, Selâahattin (Monterey, California. Naval Postgraduate School, 1975-12);
    Surface pressure, drag and lift coefficients have been experimentally determined for a right circular cylinder located near a plane surface and placed in a cross flow of air. Parametric studies were carried out for ...
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