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Assessing the impact of membrane deformations on wing sail performance

Assessing the impact of membrane deformations on wing sail performance
Assessing the impact of membrane deformations on wing sail performance
The aim of this research is to quantify the membrane deformations and their impact on performance for a ribbed wing sail. A 1m x 0.8m rectangular planform NACA0012 foil was designed to replicate a single section of a wing-sail. Two foils were manufactured based on this geometry, one out of solid foam and one using a rib and membrane structure. These were tested in the R.J. Mitchell closed return 3.6 m x 2.5 m wind tunnel at the University of Southampton. Their aerodynamic performance was assessed over a range of angles of attack using a six-component force balance showing the overall performance of the membrane wing was reduced by between 5- 11% depending on the analysis conducted. A stereo camera system was used to perform Digital Image Correlation (DIC) in order to quantify the full field deformation of the membrane wing structure whilst under aerodynamic load. This showed membrane deformations of up to 15% of the section thickness. The experimental membrane displacements were then used to create a deformed wing sail geometry, removing the effect of foil bend and twist, allowing a CFD investigation of the impact of membrane deformations alone. This indicated that the static membrane deformations resulted in a decrease in performance of up to 1.3% compared to the rigid aerofoil.
membrane deformation, fluid structure interaction, wind tunne, CFD, DIC, wing sail
2475-370X
73-90
Banks, Joseph
3e915107-6d17-4097-8e77-99c40c8c053d
Cocard, Margot
361acbd2-3c87-44e8-ba4a-c16a3a571654
Jaspe, Jacobo
8b08b34e-9377-43c6-aa8c-a9b7e4129912
Banks, Joseph
3e915107-6d17-4097-8e77-99c40c8c053d
Cocard, Margot
361acbd2-3c87-44e8-ba4a-c16a3a571654
Jaspe, Jacobo
8b08b34e-9377-43c6-aa8c-a9b7e4129912

Banks, Joseph, Cocard, Margot and Jaspe, Jacobo (2021) Assessing the impact of membrane deformations on wing sail performance. Journal of Sailing Technology, 73-90. (doi:10.5957/jst/2021.6.1.73).

Record type: Article

Abstract

The aim of this research is to quantify the membrane deformations and their impact on performance for a ribbed wing sail. A 1m x 0.8m rectangular planform NACA0012 foil was designed to replicate a single section of a wing-sail. Two foils were manufactured based on this geometry, one out of solid foam and one using a rib and membrane structure. These were tested in the R.J. Mitchell closed return 3.6 m x 2.5 m wind tunnel at the University of Southampton. Their aerodynamic performance was assessed over a range of angles of attack using a six-component force balance showing the overall performance of the membrane wing was reduced by between 5- 11% depending on the analysis conducted. A stereo camera system was used to perform Digital Image Correlation (DIC) in order to quantify the full field deformation of the membrane wing structure whilst under aerodynamic load. This showed membrane deformations of up to 15% of the section thickness. The experimental membrane displacements were then used to create a deformed wing sail geometry, removing the effect of foil bend and twist, allowing a CFD investigation of the impact of membrane deformations alone. This indicated that the static membrane deformations resulted in a decrease in performance of up to 1.3% compared to the rigid aerofoil.

Text
2021-05 Banks et al Assessing the Impact of Membrane Deformation - Version of Record
Available under License Creative Commons Attribution.
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More information

Accepted/In Press date: 12 March 2021
e-pub ahead of print date: 21 June 2021
Keywords: membrane deformation, fluid structure interaction, wind tunne, CFD, DIC, wing sail

Identifiers

Local EPrints ID: 450746
URI: http://eprints.soton.ac.uk/id/eprint/450746
ISSN: 2475-370X
PURE UUID: 796fc06e-a1c0-4889-85df-760e5529c530
ORCID for Joseph Banks: ORCID iD orcid.org/0000-0002-3777-8962

Catalogue record

Date deposited: 10 Aug 2021 16:30
Last modified: 11 Aug 2021 01:41

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Contributors

Author: Joseph Banks ORCID iD
Author: Margot Cocard
Author: Jacobo Jaspe

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