Title: New low emission strategies and combustor designs for civil aeroengine applications

Authors: Hans-Joerg Bauer

Addresses: Manager Combustor (ED-4), Rolls-Royce Deutschland Ltd & Co KG, Eschenweg 11, D-15827 Dahlewitz, Germany

Abstract: In the past, combustion computational fluid dynamics (CFD) in the framework of aeroengines mainly concentrated on high power conditions of combustors using diffusion type flames. In this paper, an overview of novel combustion concepts is given setting the scene for future CFD activities. The demand to lower emissions from jet engines powering passenger aircrafts has prompted a variety of research programmes devoted to this subject. In parallel to the optimisation of conventional combustors with respect to pollutant emissions, particularly nitrogen oxides, novel concepts have been invented, investigated and developed to different degrees of maturity. This presentation starts with a comprehensive overview on the requirements, discusses the NO formation mechanisms and presents concepts to overcome them. An assessment of the various concepts is made taking into account their specific advantages and drawbacks.

Keywords: aeroengine; gas turbine; combustion; NO_x; NO formation; operability; pressure ratio; rich burn-quick quench-lean burn combustion; lean premixed prevapourised combustion; lean direct injection; lean module; staged combustion; CFD.

DOI: 10.1504/PCFD.2004.004081

Progress in Computational Fluid Dynamics, An International Journal, 2004 Vol.4 No.3/4/5, pp.130 - 142

Published online: 10 May 2004 *

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