Sail optimisation for maximal speed
Day, Alexander (1996) Sail optimisation for maximal speed. Journal of Wind Engineering and Industrial Aerodynamics, 63 (1-3). pp. 131-154. ISSN 0167-6105
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A variety of approaches to sail optimisation are reviewed. A mathematical model is described which allows the optimisation of the spanwise lift distribution of a high speed craft with a criterion of maximal offwind speed. The model uses a numerical lifting line approach to predict the aerodynamic forces and moments allied to an empirical model of the hydrodynamic forces. A further model is presented which yields the optimal sailplan for a yacht based on a criterion of maximal speed made good to windward; this may be calculated either for a single windspeed, or in an averaged sense for a selection of different windspeeds. The vortex lattice method is used to predict aerodynamic forces and moments, whilst the hydrodynamic forces and moments are estimated using a performance prediction approach based on data from the Delft systematic yacht hull series. Three variations in rig type are considered: a basic sloop rig, a sloop rig with a roached mainsail, and a ketch rig. In both models the optimisation is carried out using a genetic algorithm. Typical results are presented, and scope for future work is discussed.
| Creators(s): |
Day, Alexander  ORCID: https://orcid.org/0000-0001-6798-3468;
| Item type: | Article |
|---|---|
| ID code: | 43574 |
| Keywords: | sail, optimisation, maximal speed, wind engineering, industrial aerodynamics, offwind speed, Naval architecture. Shipbuilding. Marine engineering, Civil and Structural Engineering, Mechanical Engineering, Renewable Energy, Sustainability and the Environment |
| Subjects: | Naval Science > Naval architecture. Shipbuilding. Marine engineering |
| Department: | Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering |
| Depositing user: | Pure Administrator |
| Date deposited: | 24 Apr 2013 10:43 |
| Last modified: | 22 Jan 2021 04:07 |
| URI: | https://strathprints.strath.ac.uk/id/eprint/43574 |
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