Buoyancy-induced flow occurs in the cavity between two corotating compressor disks when the temperature of the disks and shroud is higher than that of the air in the cavity. Coriolis forces in the rotating fluid create cyclonic and anticyclonic circulations inside the cavity, and—as such flows are three-dimensional and unsteady—the heat transfer from the solid surfaces to the air is difficult either to compute or to measure. As these flows also tend to be unstable, one flow structure can change quasi-randomly to another. This makes it hard for designers of aeroengines to calculate the transient temperature changes, thermal stresses, and radial growth of the disks during engine accelerations and decelerations. This paper reviews published research on buoyancy-induced flow in closed rotating cavities and in open cavities with either an axial throughflow or a radial inflow of air. In particular, it includes references to experimental data that could be used to validate cfd codes and numerical models.
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November 2015
Research-Article
Review of Buoyancy-Induced Flow in Rotating Cavities
Christopher A. Long
Christopher A. Long
Thermo-Fluid Mechanics Research Centre,
Department of Engineering and Design,
University of Sussex,
Brighton BN1 9QT, UK
e-mail: c.a.long@sussex.ac.uk
Department of Engineering and Design,
University of Sussex,
Brighton BN1 9QT, UK
e-mail: c.a.long@sussex.ac.uk
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J. Michael Owen
Christopher A. Long
Thermo-Fluid Mechanics Research Centre,
Department of Engineering and Design,
University of Sussex,
Brighton BN1 9QT, UK
e-mail: c.a.long@sussex.ac.uk
Department of Engineering and Design,
University of Sussex,
Brighton BN1 9QT, UK
e-mail: c.a.long@sussex.ac.uk
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received September 16, 2014; final manuscript received January 29, 2015; published online August 12, 2015. Assoc. Editor: Ardeshir (Ardy) Riahi.
J. Turbomach. Nov 2015, 137(11): 111001 (13 pages)
Published Online: August 12, 2015
Article history
Received:
September 16, 2014
Revision Received:
January 29, 2015
Citation
Michael Owen, J., and Long, C. A. (August 12, 2015). "Review of Buoyancy-Induced Flow in Rotating Cavities." ASME. J. Turbomach. November 2015; 137(11): 111001. https://doi.org/10.1115/1.4031039
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