Aspects of aero-engine nacelle drag

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dc.contributor.authorRobinson, Matthew
dc.contributor.authorMacManus, David G.
dc.contributor.authorSheaf, Christopher
dc.date.accessioned2018-04-11T09:48:00Z
dc.date.available2018-04-11T09:48:00Z
dc.date.issued2018-04-02
dc.description.abstractTo address the need for accurate nacelle drag estimation, an assessment has been made of different nacelle configurations used for drag evaluation. These include a sting mounted nacelle, a nacelle in free flow with an idealised, freestream pressure matched, efflux and a nacelle with a full exhaust system and representative nozzle pressure ratio. An aerodynamic analysis using numerical methods has been carried out on four nacelles to assess a near field drag extraction method using computational fluid dynamics. The nacelles were modelled at a range of aerodynamic conditions and three were compared against wind tunnel data. A comparison is made between the drag extraction methods used in the wind tunnel analysis and the chosen computational fluid dynamics approach which utilised the modified near-field method for evaluation of drag coefficients and trends with Mach number and mass flow. The effect of sting mounting is quantified and its influence on the drag measured by the wind tunnel methodology determined. This highlights notable differences in the rate of change of drag with free stream Mach number, and also the flow over the nacelle. A post exit stream tube was also found to create a large additional interference term acting on the nacelle. This term typically accounts for 50% of the modified nacelle drag and its inclusion increased the drag rise Mach number by around ΔM = 0.026 from M=0.849 M=0.849 to M=0.875 M=0.875 for the examples considered.en_UK
dc.identifier.citationMatthew Robinson, David G MacManus and Christopher Sheaf. Aspects of aero-engine nacelle drag. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, Volume 233, Issue 5, 2018, pp. 1667-1682en_UK
dc.identifier.issn0954-4100
dc.identifier.urihttps://doi.org/10.1177/0954410018765574
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13136
dc.language.isoenen_UK
dc.publisherSAGEen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectComputational fluid dynamicsen_UK
dc.subjectdrag predictionen_UK
dc.subjectdrag riseen_UK
dc.subjectnacelleen_UK
dc.subjectspillageen_UK
dc.titleAspects of aero-engine nacelle dragen_UK
dc.typeArticleen_UK

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