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Title: Enhanced external aerodynamic performance of a generic combustor using an integrated OGV/prediffuser design technique
Authors: Walker, Alastair Duncan
Carrotte, Jonathan F.
McGuirk, James J.
Issue Date: 2006
Publisher: © ASME
Citation: WALKER, A.D., CARROTTE, J.F. and MCGUIRK, J.J., 2006. Enhanced external aerodynamic performance of a generic combustor using an integrated OGV/prediffuser design technique. IN: Proceedings of the ASME International Gas Turbine and Aeroengine Congress and Exposition. ASME Turbo Expo 2006: Power for Land, Sea, and Air, Barcelona, 8th-11th May 2006, vol. 1, pp. 149-160
Abstract: The paper uses experimental measurements to characterise the extent that improved external aerodynamic performance (reduced total pressure loss, increased flow quality) of a gas-turbine combustion system may be achieved by adopting an integrated OGV/pre-diffuser technique. Two OGV/pre-diffuser combinations were tested. The first is a datum design corresponding to a conventional design approach, where OGV and pre-diffuser are essentially designed in isolation. The second is an 'integrated' design where the OGV blade shape has been modified, following recommendations of earlier CFD work ([14]), to produce a secondary flow/wake structure that allows the pre-diffuser to operate at a higher area ratio without boundary layer separation. This is demonstrated to increase static pressure recovery and reduce dump losses. Experimental measurements are presented on a fully annular rig. Several traverse planes are used to gather 5-hole probe data which allow the flow structure through the OGV, at inlet and exit of the pre-diffuser, and in the inner/outer annulus supply ducts to be examined. Both overall performance measures (loss coefficients) and measures of flow uniformity and quality are used to demonstrate that the integrated design is superior.
Description: This item is closed access. It is a conference paper [© ASME ]. For more information on how to obtain this article please visit the ASME Digital Library, http://www.asmedl.org/ .
Version: Closed access
DOI: 10.1115/GT2006-90184
URI: https://dspace.lboro.ac.uk/2134/5881
ISBN: 0791842363
Appears in Collections:Closed Access (Aeronautical and Automotive Engineering)

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