Leicester Research Archive

Leicester Research Archive >
College of Science and Engineering >
Engineering, Department of >
Conference Papers & Presentations, Dept. of Engineering >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/10892

Title: Investigation of Streamwise and Transverse Instabilities on Swept Cylinders and Implications for Turbine Blading
Authors: Gostelow, J. Paul
Rona, Aldo
De Saint Jean, M.
Garrett, Stephen J.
McMullan, W.A.
Issue Date: 11-Jun-2012
Presented at: ASME Turbo Expo 2012, Copenhagen, Denmark
Start Date: 11-Jun-2012
End Date: 15-Jun-2012
Publisher: American Society of Mechanical Engineers (ASME)
Citation: Proceedings of ASME Turbo Expo 2012, GT2012-69055
Abstract: The starting point for this investigation was the observation of robust streamwise streaks in flow visualization on the suction surfaces of blades in a turbine cascade at subsonic and transonic speeds. The spanwise wavelength of an array of streamwise vortices had been predicted by Kestin and Wood and is here confirmed experimentally. Observations of streaks on unswept turbine blades and on circular cylinders confirmed these earlier predictions, providing a firm basis for referencing the new measurements of vortical behavior. The observations made it clear that the boundary layers are highly three dimensional. In this paper observations of streamwise and transverse instabilities on swept circular cylinders, over a range of inclinations, are presented. The circular cylinder is a canonical case and observations relate the streamwise vorticity of the unswept case to the more aggressive crossflow instability, at high sweep angles, studied by Poll. Introducing sweep brings consideration of a wide range of instabilities. Prominent is crossflow instability resulting from the inflectional behavior of a three-dimensional boundary layer.
Links: http://www.asmeconferences.org/TE2012/SearchP(...)
http://hdl.handle.net/2381/10892
Embargo on file until: 1-Jan-10000
Version: Publisher Version
Type: Conference Paper
Rights: Copyright © 2012 by ASME.
Description: Embargo length currently unknown. Permission to make the text available has been requested from the publisher and the full text may be made available once this has been received.
Appears in Collections:Conference Papers & Presentations, Dept. of Engineering

Files in This Item:

File Description SizeFormat
ASMEGT2012-69055.pdfPublished (publisher PDF)1.25 MBAdobe PDFView/Open
View Statistics

Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.

 

MAINTAINER