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.
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ASME Turbo Expo 2006: Power for Land, Sea, and Air
May 8–11, 2006
Barcelona, Spain
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4236-3
PROCEEDINGS PAPER
Enhanced External Aerodynamic Performance of a Generic Combustor Using an Integrated OGV/Pre-Diffuser Design Technique Available to Purchase
A. Duncan Walker,
A. Duncan Walker
Loughborough University, Loughborough, UK
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Jon F. Carrotte,
Jon F. Carrotte
Loughborough University, Loughborough, UK
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James J. McGuirk
James J. McGuirk
Loughborough University, Loughborough, UK
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A. Duncan Walker
Loughborough University, Loughborough, UK
Jon F. Carrotte
Loughborough University, Loughborough, UK
James J. McGuirk
Loughborough University, Loughborough, UK
Paper No:
GT2006-90184, pp. 149-160; 12 pages
Published Online:
September 19, 2008
Citation
Walker, AD, Carrotte, JF, & McGuirk, JJ. "Enhanced External Aerodynamic Performance of a Generic Combustor Using an Integrated OGV/Pre-Diffuser Design Technique." Proceedings of the ASME Turbo Expo 2006: Power for Land, Sea, and Air. Volume 1: Combustion and Fuels, Education. Barcelona, Spain. May 8–11, 2006. pp. 149-160. ASME. https://doi.org/10.1115/GT2006-90184
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