This paper demonstrates similarities between the vortex shedding from blunt trailing-edge transonic turbine nozzle blades and from oscillating airfoils and bluff bodies. Under subsonic conditions the turbine nozzle cascade shed wake vortices in a conventional von Kármán vortex street. This was linked with a depressed base pressure and associated energy separation in the wake. Under transonic conditions a variety of different shedding configurations was observed with vortices shedding and pairing in several different ways. Similarities are addressed between the observed structures and those from vortex shedding in some other physical situations, such as the vortex wakes shed from cylinders and airfoils in sinusoidal heaving motion in low-speed flow. The established field of vortex-induced vibration has provided a developed classification scheme for the phenomena observed. The paper has brought together three previously independent fields of investigation and, by showing that the three are essentially related, has provided the basis for a new synthesis.
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July 2006
Technical Papers
On Vortex Formation in the Wake Flows of Transonic Turbine Blades and Oscillating Airfoils
J. P. Gostelow,
J. P. Gostelow
Department of Engineering,
University of Leicester
, University Road, Leicester LE1 7RH, UK
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M. F. Platzer,
M. F. Platzer
AeroHydro R&T Associates
, 3070 Hermitage Road, Pebble Beach, CA 93953
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W. E. Carscallen
W. E. Carscallen
Institute for Aerospace Research,
National Research Council of Canada
, Ottawa, ON K1A OR6, Canada
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J. P. Gostelow
Department of Engineering,
University of Leicester
, University Road, Leicester LE1 7RH, UK
M. F. Platzer
AeroHydro R&T Associates
, 3070 Hermitage Road, Pebble Beach, CA 93953
W. E. Carscallen
Institute for Aerospace Research,
National Research Council of Canada
, Ottawa, ON K1A OR6, CanadaJ. Turbomach. Jul 2006, 128(3): 528-535 (8 pages)
Published Online: February 1, 2005
Article history
Received:
October 1, 2004
Revised:
February 1, 2005
Citation
Gostelow, J. P., Platzer, M. F., and Carscallen, W. E. (February 1, 2005). "On Vortex Formation in the Wake Flows of Transonic Turbine Blades and Oscillating Airfoils." ASME. J. Turbomach. July 2006; 128(3): 528–535. https://doi.org/10.1115/1.2184354
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