Evolutionary shape optimisation enhances the lift coefficient of rotating wing geometries

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Wing shape is an important factor affecting the aerodynamic performance of wings of monocopters and flapping-wing micro air vehicles. Here, an evolutionary structural optimisation method is adapted to optimise wing shape to enhance the lift force due to aerodynamic pressure on the wing surfaces. The pressure distribution is observed to vary with the span-based Reynolds number over a range covering most insects and samaras. Accordingly, the optimised wing shapes derived using this evolutionary approach are shown to adjust with Reynolds number. Moreover, these optimised shapes exhibit significantly higher lift coefficients than the initial rectangular wing forebear. Interestingly, the optimised shapes are found to have a large area outboard, broadly in line with the features of high-lift forewings of multi-winged insects. According to specific aerodynamic performance requirements, this novel method could be employed in the optimisation of improved wing shapes for micro air vehicles.

Original languageEnglish
Pages (from-to)369-384
Number of pages16
JournalJournal of Fluid Mechanics
Volume868
DOIs
Publication statusPublished - 10 Jun 2019

Keywords

  • Swimming/flying

Cite this

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title = "Evolutionary shape optimisation enhances the lift coefficient of rotating wing geometries",
abstract = "Wing shape is an important factor affecting the aerodynamic performance of wings of monocopters and flapping-wing micro air vehicles. Here, an evolutionary structural optimisation method is adapted to optimise wing shape to enhance the lift force due to aerodynamic pressure on the wing surfaces. The pressure distribution is observed to vary with the span-based Reynolds number over a range covering most insects and samaras. Accordingly, the optimised wing shapes derived using this evolutionary approach are shown to adjust with Reynolds number. Moreover, these optimised shapes exhibit significantly higher lift coefficients than the initial rectangular wing forebear. Interestingly, the optimised shapes are found to have a large area outboard, broadly in line with the features of high-lift forewings of multi-winged insects. According to specific aerodynamic performance requirements, this novel method could be employed in the optimisation of improved wing shapes for micro air vehicles.",
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author = "Bhat, {Shantanu S.} and Jisheng Zhao and John Sheridan and Kerry Hourigan and Thompson, {Mark C.}",
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Evolutionary shape optimisation enhances the lift coefficient of rotating wing geometries. / Bhat, Shantanu S.; Zhao, Jisheng; Sheridan, John; Hourigan, Kerry; Thompson, Mark C.

In: Journal of Fluid Mechanics, Vol. 868, 10.06.2019, p. 369-384.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Evolutionary shape optimisation enhances the lift coefficient of rotating wing geometries

AU - Bhat, Shantanu S.

AU - Zhao, Jisheng

AU - Sheridan, John

AU - Hourigan, Kerry

AU - Thompson, Mark C.

PY - 2019/6/10

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AB - Wing shape is an important factor affecting the aerodynamic performance of wings of monocopters and flapping-wing micro air vehicles. Here, an evolutionary structural optimisation method is adapted to optimise wing shape to enhance the lift force due to aerodynamic pressure on the wing surfaces. The pressure distribution is observed to vary with the span-based Reynolds number over a range covering most insects and samaras. Accordingly, the optimised wing shapes derived using this evolutionary approach are shown to adjust with Reynolds number. Moreover, these optimised shapes exhibit significantly higher lift coefficients than the initial rectangular wing forebear. Interestingly, the optimised shapes are found to have a large area outboard, broadly in line with the features of high-lift forewings of multi-winged insects. According to specific aerodynamic performance requirements, this novel method could be employed in the optimisation of improved wing shapes for micro air vehicles.

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