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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: 2007
Publisher: © ASME
Citation: WALKER, A.D., CARROTTE, J.F. and MCGUIRK, J.J., 2007. Enhanced external aerodynamic performance of a generic combustor using an integrated OGV/prediffuser design technique. Journal of Engineering for Gas Turbines and Power, 129 (1), pp. 80-87
Abstract: In this paper we use experimental measurements to characterize the extent that improved the external aerodynamic performance (reduced total pressure loss, increased flow quality) of a gas-turbine combustion system may be achieved by adopting an integrated OGV/prediffuser technique. Two OGV/prediffuser combinations were tested. The first is a datum design corresponding to a conventional design approach, where the OGV and prediffuser 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 (Final Report No. TT03R01, 2003), to produce a secondary flow/wake structure that allows the prediffuser 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 five-hole probe data that allow the flow structure through the OGV, at the inlet and exit of the prediffuser, 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 an article from the serial, Journal of Engineering for Gas Turbines and Power [© ASME ]. For more information on how to obtain this article please visit the ASME Digital Library, http://www.asmedl.org/ .
Version: Closed access
DOI: 10.1115/1.2364008
URI: https://dspace.lboro.ac.uk/2134/5880
ISSN: 0742-4795
Appears in Collections:Closed Access (Aeronautical and Automotive Engineering)

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