Hydrodynamic performance of a Magnus anti-rolling device at zero and low ship speeds
Hydrodynamic performance of a Magnus anti-rolling device at zero and low ship speeds
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DOI：
10.1016/j.oceaneng.2021.109008
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发表时间：
2021-06
影响因子：
5
通讯作者：
Jianfeng Lin;Yang Han;Yumin Su;Yu Wang;Zuo-tian Zhang;R. Jiang
中科院分区：
文献类型：
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作者：
Jianfeng Lin;Yang Han;Yumin Su;Yu Wang;Zuo-tian Zhang;R. Jiang
优良的耐波性是船舶安全营运的基础。基于马格努斯效应的摆动旋转圆柱体减摇装置可以在任何船速下提供减摇措施。本文采用大涡模拟方法研究了Magnus减摇装置的水动力性能，并对其工作原理进行了分析。无量纲参数-旋转与摆动比（即，旋转速度与缸的摆动速度之比）-被提议用于流体动力学分析。根据摆角、角速度和旋摆比的变化，观察了Magnus减摇装置在零航速和低航速下的升阻特性和尾流场的变化。研究了低航速下，来流相对流速对Magnus减摇装置上、下游摆动时水动力特性的影响。结果表明，在零转速时，可以获得最佳的旋转摆动比，并且差动摆动方法可以在低速时提供大而一致的升力。对马格纳斯减摇装置水动力特性的分析有助于船舶耐波性策略的研究。
Excellent seakeeping performance is the basis of safe ship operation. An anti-rolling device employing swinging rotating cylinders based on the Magnus effect can provide anti-rolling measures at any ship speed. In this study, the operating principle of a Magnus anti-rolling device was examined by studying its hydrodynamic performance using large eddy simulation method. A dimensionless parameter—the rotation to swing ratio (i.e., the ratio of the rotational speed to the swing speed of the cylinder)—was proposed for use in the hydrodynamic analysis. The changes in lift-drag characteristics and wake-flow field of the Magnus anti-rolling device were observed at zero and low ship speeds according to the swing angle, angular velocity, and rotation to swing ratio. The influence of the relative incoming flow velocity on the hydrodynamic characteristics of the Magnus anti-rolling device, when swinging upstream and downstream, was also studied at a low ship speed. The results show that an optimal rotation to swing ratio can be obtained at zero speed, and that the differential swing method can provide a large and consistent lift at low speeds. This analysis of the hydrodynamic characteristics of the Magnus anti-rolling device contributes to the study of ship seakeeping strategies.