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Title: On Vortex Formation in the Wake Flows of Transonic Turbine Blades and Oscillating Airfoils
Authors: Gostelow, Jonathan Paul
Platzer, M. F.
Carscallen, William E.
First Published: 2006
Citation: Journal of Turbomachinery, 2006, 128, (3), pp.528-535
Abstract: 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.
DOI Link: 10.1115/1.2184354
ISSN: 1065-3090
Type: Article
Description: This paper was published as Journal of Turbomachinery, 2006, 128, (3), pp.528-535. It is available from DOI: 10.1115/1.2184354
Appears in Collections:Published Articles, Dept. of Engineering

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