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Enhanced external aerodynamic performance of a generic combustor using an integrated OGV/prediffuser design technique

journal contribution
posted on 28.01.2010, 13:49 by Duncan WalkerDuncan Walker, Jon CarrotteJon Carrotte, Jim McGuirk
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.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

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

Publisher

© ASME

Version

NA (Not Applicable or Unknown)

Publication date

2007

Notes

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/ .

ISSN

0742-4795

Language

en

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