Numerical Study of Sail Aerodynamics

[+] Author and Article Information
Michel Guilbaud

CEAT-LEA (UMR CNRS no. 6609), Université de Poitiers, 43 rue de l’Aérodrome, 86036 Poitiers Cedex, France

D. R. Rajaona

Laboratoire de Mécanique, Université du Havre, Quai Frissard, 76000 Le Havre, France

J. Fluids Eng 119(4), 960-967 (Dec 01, 1997) (8 pages) doi:10.1115/1.2819524 History: Received October 17, 1996; Revised July 14, 1997; Online January 22, 2008


A boundary-element method to compute steady flows around a set of sails at close hauled conditions. (i.e., the wind is coming from upstream of the boat at a moderate angle of attack for the sails) is presented. It is based on a mixed potential-velocity formulation in order to solve the problem of zero thickness sail conditions. An iterative procedure is proposed to account for the interaction between sails; the shape of the wake of the leading sail is computed as and equilibrium stream surface in such a way that the plane wake assumption is not used. Numerical results are compared with tests conducted on isolated jibs and sets of jib and main sails in wind tunnels.

Copyright © 1997 by The American Society of Mechanical Engineers
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