Aerodynamic optimisation of civil aero-engine nacelles by dimensionality reduction and multi-fidelity techniques

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dc.contributor.authorTejero, Fernando
dc.contributor.authorMacManus, David G.
dc.contributor.authorHueso Rebassa, Josep
dc.contributor.authorSanchez Moreno, Francisco
dc.contributor.authorGoulos, Ioannis
dc.contributor.authorSheaf, Christopher T.
dc.date.accessioned2022-09-29T11:31:47Z
dc.date.available2022-09-29T11:31:47Z
dc.date.issued2022-09-30
dc.description.abstractPurpose - Aerodynamic shape optimisation is complex due to the high dimensionality of the problem, the associated non-linearity and its large computational cost. These three aspects have an impact on the overall time of the design process. To overcome these challenges, this paper develops a method for transonic aerodynamic design with dimensionality reduction and multi-fidelity techniques. Design/methodology/approach - The developed methodology is used for the optimisation of an installed civil ultra-high bypass ratio aero-engine nacelle. As such, the effects of airframe-engine integration are considered during the optimisation routine. The active subspace method is applied to reduce the dimensionality of the problem from 32 to 2 design variables with a database compiled with Euler CFD calculations. In the reduced dimensional space, a co-Kriging model is built to combine Euler lower-fidelity and RANS higher-fidelity CFD evaluations. Findings - Relative to a baseline aero-engine nacelle derived from an isolated optimisation process, the proposed method yielded a non-axisymmetric nacelle configuration with an increment in net vehicle force of 0.65% of the nominal standard net thrust. Originality - This work investigates the viability of CFD optimisation through a combination of dimensionality reduction and multi-fidelity method, and demonstrates that the developed methodology enables the optimisation of complex aerodynamic problems.en_UK
dc.description.sponsorshipEuropean Union funding: 820997en_UK
dc.identifier.citationTejero F, MacManus DG, Hueso-Rebassa J, et al., (2023) Aerodynamic optimisation of civil aero-engine nacelles by dimensionality reduction and multi-fidelity techniques, International Journal of Numerical Methods for Heat and Fluid Flow, Volume 33, Issue 4, April 2023, pp. 1336-1353en_UK
dc.identifier.issn0961-5539
dc.identifier.urihttps://doi.org/10.1108/HFF-06-2022-0368
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/18492
dc.language.isoenen_UK
dc.publisherEmeralden_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectOptimizationen_UK
dc.subjectdimensionality reductionen_UK
dc.subjectmulti-fidelityen_UK
dc.subjectactive subspaceen_UK
dc.subjectco-krigingen_UK
dc.titleAerodynamic optimisation of civil aero-engine nacelles by dimensionality reduction and multi-fidelity techniquesen_UK
dc.typeArticleen_UK

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