Abstract
This paper describes an on board measurement campaign held in Grande-Rivière, Gaspésie, Province of Québec, Canada, in October 2015, involving a 13-meter trawler equipped with a 50-square-meter kite. The aim of the campaign was to access the boat performance when the kite is used for auxiliary propulsion. To achieve this purpose, in addition to the kite control system, a set of sensors was installed. During the trials, runs with kite in static flight were done, with around 12 knots of true wind speed. The data post processing is presented in this paper, and allows an estimate of the lift coefficient and the lift to drag ratio of the kite and the tethers. The collected data are consistent with other experimental data published.
Highlights
The current research project, undertaken by the company BEYOND THE SEA®, and managed in partnership with ENSTA Bretagne, aims to develop kites as auxiliary propulsion system for ships
The kite force vector Fk was measured with the 3D load cell rigidly fixed to the ship, and the vector is at first expressed in the ship reference frame, denoted with superscript (s)
The previous part led to the identification of lift and drag components of kite force, from the measured force expressed in the relative wind axis system
Summary
The current research project, undertaken by the company BEYOND THE SEA®, and managed in partnership with ENSTA Bretagne, aims to develop kites as auxiliary propulsion system for ships. In this context, a sea trial and a measurement campaign have been set up in partnership with a Canadian fishing vessel and the Merinov institute, located in Grande-Rivière, Gaspésie, Province of Québec, Canada in October 2015. The kite used during the trials had an area of 50 m2 (34 m2 of projected area), with an inflatable leading edge, and 9 inflatable battens. Logged data were used to compute the lift to drag ratio and the lift coefficient of the kite. The obtained lift to drag ratio and lift coefficient make sense with other experimental works like Dadd (2012)
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