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Numerical analysis of the effects of stern flaps on ship resistance and propulsion performance

机译：船尾襟翼对船舶阻力和推进性能影响的数值分析

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When a stern flap is installed on a high-speed surface ship, its role is often to reduce the ship resistance. However, the performance of a stern flap determined based on direct conversion of ship model resistance test results often has a large error. In this study, the ship model and stern flap coupling resistance tests and self-propulsion tests with integrated coupling of a ship-propeller-rudder-stern flap were performed based on the Reynolds-averaged Navier-Stokes method. The hull and propeller motions were based on overlapping grid and sliding mesh technology. The results show that while a stern flap reduces the ship resistance, it also affects the ship model flow field to a certain extent, consequently affecting the propulsion performance of the ship. The improvement in ship propulsion performance is one of the main factors contributing to the energy savings achieved by installing a stern flap, with a contribution between 30% and 50%. The integrated ship-propeller-rudder-stern flap calculation method is significantly improved compared with traditional ship model resistance tests as a means of determining the stern flap performances of full-scale ships.
机译：在高速水面船上安装船尾襟翼时，其作用通常是减小船的阻力。但是，基于船模抗力测试结果的直接转换确定的船尾襟翼的性能通常会有很大的误差。在这项研究中，基于雷诺平均Navier-Stokes方法，进行了船舶模型和船尾襟翼的耦合阻力测试以及船用螺旋桨－舵－尾襟翼的整体耦合的自推进测试。船体和螺旋桨运动基于重叠网格和滑动网格技术。结果表明，船尾襟翼虽然减小了船舶阻力，但也在一定程度上影响了船舶模型的流场，进而影响了船舶的推进性能。船舶推进性能的改善是通过安装船尾襟翼实现节能的主要因素之一，其贡献在30％至50％之间。作为确定全尺寸船尾襟翼性能的一种方法，与传统的船模阻力试验相比，集成的船螺旋桨-舵-尾襟翼计算方法得到了显着改进。

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