Nacelle design for ultra-high bypass ratio engines with CFD based optimisation

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dc.contributor.authorRobinson, Matthew
dc.contributor.authorMacManus, David G.
dc.contributor.authorChristie, Robert
dc.contributor.authorSheaf, Christopher
dc.contributor.authorGrech, Nicholas
dc.date.accessioned2020-09-10T15:35:12Z
dc.date.available2020-09-10T15:35:12Z
dc.date.issued2020-09-09
dc.description.abstractAs the size of aero-engines has increased in recent years, the need for slimmer and shorter nacelles has become more pressing. A more aggressive design space must therefore be explored for nacelle designs which are expected to perform worse in the off design conditions such as spillage than current nacelle designs. In this work, a novel design space has been explored through the use of an optimisation method which evaluated nacelle aerodynamic performance based on computational fluid dynamics simulations. A multi-objective optimisation was undertaken where cruise drag, drag rise Mach number, spillage drag and two metrics based on the pressure distribution of the nacelle were optimised. Comparable optimal designs were picked from the Pareto sets of optimisations carried out at different nacelle lengths and radial offsets and some key outcomes established from their aerodynamics and geometries. It was determined that a reduction in the length of the nacelle from 3.8 highlight radii to 3.1 radii resulted in a significantly worse aerodynamic performance which included an increase in peak surface isentropic Mach number at cruise of 0.1 and up to four times as much spillage drag. It was however also established from the optimisation results that as the required drag rise Mach number was decreased the overall performance of short nacelles improved significantly.en_UK
dc.identifier.citationRobinson M, MacManus DG, Christie R, et al., (2020) Nacelle design for ultra-high bypass ratio engines with CFD based optimisation. Aerospace Science and Technology, Volume 113, June 2020, Article number 106191en_UK
dc.identifier.issn1270-9638
dc.identifier.urihttps://doi.org/10.1016/j.ast.2020.106191
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15781
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectOptimisationen_UK
dc.subjectNacelleen_UK
dc.subjectCFDen_UK
dc.subjectUHBPRen_UK
dc.titleNacelle design for ultra-high bypass ratio engines with CFD based optimisationen_UK
dc.typeArticleen_UK
dcterms.dateAccepted2020-09-03

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