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- W2894164697 abstract "This work presents a wind tunnel experimental study on the effect of the leading edge flapping on the aerodynamic performance of a spinnaker. Four J80-class spinnaker models, combining two different assembling structures (panel layout) and two different sail materials are tested at various wind speeds and wind angles in a wind tunnel. Results show that, for the wind angle range the spinnaker is designed for, the sustained periodic flapping of the sail leading edge has a significant benefit on performance, with 10% increase in drive force. In these model-scale tests, the sail structural properties did not show significant differences in performance, but affect the point where flapping sets in: a model with a stiffer material and a cross-cut panel layout starts flapping for a longer sheet length, compared to a lighter cloth and a tri-radial layout. Finally, it is shown that the non-dimensional flapping frequency is rather constant ≃0.4 in the design range of wind angle, but it varies with the wind speed and sail structural properties on a smaller wind angle where the spinnaker is more stretched." @default.
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- W2894164697 date "2018-12-01" @default.
- W2894164697 modified "2023-10-04" @default.
- W2894164697 title "Performance enhancement of downwind sails due to leading edge flapping: A wind tunnel investigation" @default.
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- W2894164697 doi "https://doi.org/10.1016/j.oceaneng.2018.08.037" @default.
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