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《Ship Engineering》 1993-06
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Energy-saving Potential of Sail-assisted Motorships alonq the China's Coast

Zhang Renyi  
Based on the analysis of the forces acting on a sail-assisted motorship, the mathematical models for estimating the energy-saving effect on ship propulsion is established. According to the statistical data of wind force and direction along the coastal waters of China, by using the aerodynamic characteristics of rectangular rigid sails under laminar flow obtained from tests in wind-tunnel, the power gain of sail area per square meter for ships along the service route may be calculated with the aid of computer program. The energy-saving potential is worthwhile to be considered. The dimensions of auxiliary sails to be set up on board motorship may be determined in the preliminary design stage.
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