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|Title: ||Compressor/diffuser/combustor aerodynamic interactions in lean module combustors|
|Authors: ||Walker, Alastair Duncan|
Carrotte, Jonathan F.
McGuirk, James J.
|Issue Date: ||2008|
|Publisher: ||© ASME|
|Citation: ||WALKER, A.D., CARROTTE, J.F. and MCGUIRK, J.J., 2008. Compressor/diffuser/combustor aerodynamic interactions in lean module combustors. Journal of Engineering for Gas Turbines and Power, 130 (1), pp. 011504-1-011504-8|
|Abstract: ||The paper reports an experimental investigation into the possibility of increased interactions between combustor external aerodynamics and upstream components, e.g., prediffuser, compressor outlet guide vane (OGV), and even the compressor rotor, caused by the trend in lean module fuel injectors to larger mass flows entering the combustor cowl. To explore these component interaction effects, measurements were made on a fully annular rig comprising a single stage compressor, an advanced integrated OGV/prediffuser, followed by a dump diffuser and a generic combustor flametube with metered cowl and inner/outer annulus flows. The flow split entering the cowl was increased from 30% to 70%. The results demonstrate that, with fixed geometry, as the injector flow increases, the performance of the prediffuser and feed annuli suffer. Prediffuser losses increase and at high injector flow rates, the diffuser moves close to separation. The substantial circumferential variation in cowl flow can feed upstream and cause rotor forcing. Notable differences in performance were observed inline and between injectors at the OGV exit, suggesting that geometry changes such as an increased dump gap or nonaxisymmetric prediffuser designs may be beneficial.|
|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|
|Appears in Collections:||Closed Access (Aeronautical and Automotive Engineering)|
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