In order to gain an understanding of the conditions inside air-cooled, gas-turbine rotors, flow visualization, laser-doppler anemometry, and heat-transfer measurements have been made in a rotating cavity with either an axial throughflow or a radial outflow of coolant. For the axial throughflow tests, a correlation has been obtained for the mean Nusselt number in terms of the cavity gap ratio, the axial Reynolds number, and rotational Grashof number. For the radial outflow tests, velocity measurements are in good agreement with solutions of the linear (laminar and turbulent) Ekman layer equations, and flow visualization has revealed the destabilizing effect of buoyancy forces on the flow structure. The mean Nusselt numbers have been correlated, for the radial outflow case, over a wide range of gap ratios, coolant flow rates, rotational Reynolds numbers, and Grashof numbers. As well as the three (forced convection) regimes established from previous experiments, a fourth (free convection) regime has been identified.
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April 1983
This article was originally published in
Journal of Engineering for Power
Research Papers
Convective Heat Transfer in a Rotating Cylindrical Cavity
J. M. Owen,
J. M. Owen
School of Engineering and Applied Sciences, University of Sussex, England
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H. S. Onur
H. S. Onur
Makina Mu¨hendislig¯i Bo¨lu¨mu¨, Karadeniz U¨niversitesi, Trabzon, Turkey
Search for other works by this author on:
J. M. Owen
School of Engineering and Applied Sciences, University of Sussex, England
H. S. Onur
Makina Mu¨hendislig¯i Bo¨lu¨mu¨, Karadeniz U¨niversitesi, Trabzon, Turkey
J. Eng. Power. Apr 1983, 105(2): 265-271 (7 pages)
Published Online: April 1, 1983
Article history
Received:
December 11, 1981
Online:
September 28, 2009
Citation
Owen, J. M., and Onur, H. S. (April 1, 1983). "Convective Heat Transfer in a Rotating Cylindrical Cavity." ASME. J. Eng. Power. April 1983; 105(2): 265–271. https://doi.org/10.1115/1.3227411
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