COMPUTATIONAL ANALYSIS OF TWIN-SKIN CLOTH SAILS FOR HIGH-PERFORMANCE SAILING VESSELS
Caraher, Sean P.
Hobson, Garth V.
Gannon, Anthony J.
MetadataShow full item record
Current efforts to reduce carbon emissions have brought a resurgence of interest in sail design. Sails could be used to supplement conventional propulsion on cargo vessels or even be used on future energy ships. Energy ships are conceptual vessels that would roam the oceans harvesting energy using hydroelectric turbines and the power developed by sails. To further the estimates of energy ship power production, a towable drag device was designed and built to provide data about the effect of a hydro-electric turbine’s drag on a vessel’s speed. In addition, computational fluid dynamics studies were conducted on a new twin-skin sail design to determine its potential for use on energy-ships. This twin skin sail differs from traditional sails by using two cloth elements to create an airfoil-like section with finite thickness. Both fluid-structure interaction and typical static simulations were performed. Findings show that the twin-skin mainsail aerodynamically outperforms all but two-element rigid sails. In addition, twin-skin mainsails have the ability to be reefed or completely taken down, making them more manageable in extreme weather. This performance in addition to its ease of handling makes it a good fit for use on an energy-ship. Future work should be done to analyze this design in three-dimensional flows as well as the effects of mounting multiple sails on a single vessel.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Operating Range for a Combined, Building-Scale Liquid Air Energy Storage and Expansion System: Energy and Exergy Analysis Howe, Todd A.; Pollman, Anthony G.; Gannon, Anthony J. (MDPI, 2018);This paper presents the results of an ideal theoretical energy and exergy analysis for a combined, building scale Liquid Air Energy Storage (LAES) and expansion turbine system. This work identifies the upper bounds of ...
Whitney, Laura; Regnier, Eva; Simon, Jay; Nussbaum, Daniel (Monterey, California. Naval Postgraduate School, 2013-08); NPS-OR-13-003The United States Department of Defense (DoD) has identified energy as a key vulnerability and has made substantial moves to improve its energy profile in the last decade, including establishing a new Assistant Secretary ...
Shaffer, Brenda (2017-10-27);With Guest Lecturer Professor Brenda Shaffer, Center for Eurasian, Russian and Eastern European Studies (CERES), Georgetown University