In compressor inter-disc cavities with a central axial throughflow it is known that the flow and heat transfer is strongly affected by buoyancy in the centrifugal force field. As a step towards developing CFD methods for such flows, buoyancy-driven flows under gravity in a closed cube and under centrifugal force in a sealed rotating annulus have been studied. Numerical simulations are compared with the experimental results of Kirkpatrick and Bohn (1986) and Bohn et al (1993). Two different CFD codes have been used and are shown to agree for the stationary cube problem. Unsteady simulations for the stationary cube show good agreement with measurements of heat transfer, temperature fluctuations, and velocity fluctuations for Rayleigh numbers up to 2 × 1010. Similar simulations for the rotating annulus also show good agreement with measured heat transfer rates. The CFD results confirm Bohn et al’s results, showing reduced heat transfer and a different Rayleigh number dependency compared to gravity-driven flow. Large scale flow structures are found to occur, at all Rayleigh numbers considered.
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ASME Turbo Expo 2004: Power for Land, Sea, and Air
June 14–17, 2004
Vienna, Austria
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4169-3
PROCEEDINGS PAPER
Numerical Simulation of Natural Convection in Stationary and Rotating Cavities
Zixiang Sun,
Zixiang Sun
University of Surrey, Guildford, Surrey, UK
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Alistair Kifoil,
Alistair Kifoil
Rolls-Royce plc, Bristol, UK
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John W. Chew,
John W. Chew
University of Surrey, Guildford, Surrey, UK
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Nicholas J. Hills
Nicholas J. Hills
University of Sussex, Brighton, East Sussex, UK
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Zixiang Sun
University of Surrey, Guildford, Surrey, UK
Alistair Kifoil
Rolls-Royce plc, Bristol, UK
John W. Chew
University of Surrey, Guildford, Surrey, UK
Nicholas J. Hills
University of Sussex, Brighton, East Sussex, UK
Paper No:
GT2004-53528, pp. 381-389; 9 pages
Published Online:
November 24, 2008
Citation
Sun, Z, Kifoil, A, Chew, JW, & Hills, NJ. "Numerical Simulation of Natural Convection in Stationary and Rotating Cavities." Proceedings of the ASME Turbo Expo 2004: Power for Land, Sea, and Air. Volume 4: Turbo Expo 2004. Vienna, Austria. June 14–17, 2004. pp. 381-389. ASME. https://doi.org/10.1115/GT2004-53528
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