ABSTRACT Energy-saving devices for 317 K VLCC have been developed from a propulsion standpoint. Two ESD candidates were designed via computational tools. The first device WAFon composes of flow-control fins adapted for the ship wake to reduce the loss of rotational energy. The other is WAFon-D, which is a WAFon with a duct to obtain additional thrust and to distribute the inflow velocity on the propeller plane uniform. After selecting the candidates from the computed results, the speed performances were validated with model-tests. The hydrodynamic characteristics of the ESDs may be found in improved hull and propulsive efficiencies through increased wake fraction.
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机译：摘要从推进的角度出发，已经开发出用于317 K VLCC的节能装置。通过计算工具设计了两个ESD候选对象。第一装置WAFon包括适于船尾以减少旋转能量损失的流量控制鳍片。另一个是WAFon-D，它是带有管道的WAFon，用于获得额外的推力并在螺旋桨平面上均匀分配流入速度。从计算结果中选择候选者后，通过模型测试验证了速度性能。 ESD的水动力特性可通过增加尾流比提高船体和推进效率。
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