Design and analysis of non-axisymmetric installed aero-engine exhaust systems

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dc.contributor.authorOtter, John J.
dc.contributor.authorGoulos, Ioannis
dc.contributor.authorChristie, Robert
dc.contributor.authorMacManus, David G.
dc.date.accessioned2020-09-22T10:00:25Z
dc.date.available2020-09-22T10:00:25Z
dc.date.issued2020-09-17
dc.description.abstractIn order to increase propulsive efficiency, and hence reduce fuel consumption, future aero-engines are expected to operate with higher bypass ratios and larger fan diameters relative to current in-service engines. As such, propulsion systems are likely to be more closely-coupled with the airframe which is expected to accentuate detrimental aerodynamic interference effects between the engine and airframe. It is therefore crucial that the design of future aero-engine exhaust systems is considered as part of an engine-airframe configuration in order to ensure that the expected benefits of high BPR engines are realised. This work presents the aerodynamic performance and evaluation of a set of novel exhaust systems within complete engine-airframe configurations. The introduction of non-axisymmetric exhaust systems was shown to mitigate the aerodynamic penalties associated with closely-coupled propulsion systems at cruise conditions. Relative to an axisymmetric baseline configuration, the introduction of non-axisymmetric bypass and core nozzles were found to increase the net vehicle force of the engine-airframe configuration by 0.8% and 0.6% respectively. As a result of this work, it can be concluded that non-axisymmetric exhaust systems represent a viable method for reducing aircraft cruise fuel burn.en_UK
dc.identifier.citationOtter JJ, Goulos I, Christie R, MacManus DG. (2020) Design and analysis of non-axisymmetric installed aero-engine exhaust systems. Aerospace Science and Technology, Volume 106, November 2020, Article number 106210en_UK
dc.identifier.issn1270-9638
dc.identifier.urihttps://doi.org/10.1016/j.ast.2020.106210
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15821
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectEngine-airframe Integrationen_UK
dc.subjectNon-axisymmetricen_UK
dc.subjectAero-engineen_UK
dc.subjectComputational Fluid Dynamicsen_UK
dc.subjectExhaust Nozzleen_UK
dc.subjectClass Shape Transformationen_UK
dc.subjectPropulsion System Integrationen_UK
dc.titleDesign and analysis of non-axisymmetric installed aero-engine exhaust systemsen_UK
dc.typeArticleen_UK

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