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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 (), 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|
|Appears in Collections:||Closed Access (Aeronautical and Automotive Engineering)|
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