Abstract
| Language | English |
|---|---|
| Pages | 131-154 |
| Number of pages | 23 |
| Journal | Journal of Wind Engineering and Industrial Aerodynamics |
| Volume | 63 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - Oct 1996 |
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Keywords
- sail
- optimisation
- maximal speed
- wind engineering
- industrial aerodynamics
- offwind speed
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Sail optimisation for maximal speed. / Day, Alexander.
In: Journal of Wind Engineering and Industrial Aerodynamics, Vol. 63, No. 1-3, 10.1996, p. 131-154.Research output: Contribution to journal › Article
TY - JOUR
T1 - Sail optimisation for maximal speed
AU - Day, Alexander
PY - 1996/10
Y1 - 1996/10
N2 - 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.
AB - 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.
KW - sail
KW - optimisation
KW - maximal speed
KW - wind engineering
KW - industrial aerodynamics
KW - offwind speed
U2 - 10.1016/S0167-6105(96)00073-6
DO - 10.1016/S0167-6105(96)00073-6
M3 - Article
VL - 63
SP - 131
EP - 154
JO - Journal of Wind Engineering and Industrial Aerodynamics
T2 - Journal of Wind Engineering and Industrial Aerodynamics
JF - Journal of Wind Engineering and Industrial Aerodynamics
SN - 0167-6105
IS - 1-3
ER -