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首页> 外文期刊>Applied Ocean Research >CFD analysis of the sensitivity of propeller bearing loads to stern appendages and propulsive configurations
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CFD analysis of the sensitivity of propeller bearing loads to stern appendages and propulsive configurations

机译：CFD分析螺旋桨轴承荷载件船尾的敏感性和推进配置

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Highlights?Effects of stern appendages and the propulsion system on the loads generated by the propeller.?Modifications to centreline skeg and direction of rotation of propellers are considered for a twin screw ship.?Mitigation of propeller-wake interaction in maneuvring conditions.AbstractThe present investigation focuses on the effects of the stern appendages and the propulsion system on the hydro-loads generated by the propeller during off-design conditions, with particular emphasis on the in-plane components. Recent experimental investigations carried out by free running model tests and CFD analysis for a modern twin screw model, highlighted that maneuvers at small drift angles and yaw rates might be as critical as the tighter ones due to complex propeller-wake interactions. Therefore, design criteria should take into account also these operative conditions, in order to reduce the effects of propeller-wake interaction phenomena that degrade the overall propulsive efficiency, induce shaft/hull structural vibration and increase noise emission. In the present study we analyze the effects of geometric and propulsive modifications with respect to the twin screw configuration studied in . In particular, the effect of the centreline skeg, propeller direction of rotation and control strategies of the propulsion plant on the propeller bearing loads have been investigated from the analysis of the nominal wake in maneuvring conditions, computed by unsteady RANSE simulations coupled with a propeller model based on Blade Element Theory. The considered test cases were turning circle maneuvers with different rudder angles atFN=0.265.]]>
机译：<！[cdata [ 突出显示 ？ 螺旋桨生成的负载上的推进系统的效果。 ？ 对中心线skeg和螺旋桨旋转方向的修改被认为是一个双螺杆船。 ？ 手术条件下螺旋桨唤醒交互的缓解。 < / ce：abstract-sec> 抽象 本研究侧重于船尾附属物和推进系统对螺旋桨在非设计条件下产生的水力载荷的影响，特别强调面内部件。最近通过自由运行模型测试和现代双螺杆模型的CFD分析进行的最新实验研究，突出显示，由于复杂的螺旋桨 - 唤醒相互作用，小漂移角和横摆率下的操纵可能与更紧密的速率一样重要。因此，设计标准也应考虑这些操作条件，以减少螺旋桨 - 唤醒相互作用现象的影响，降低整体推进效率，诱导轴/船体结构振动和增加噪声排放。在本研究中，我们分析了研究中研究的双螺杆配置的几何和推进修改的影响。特别地，已经研究了所以中压线Skeg，螺旋桨旋转和控制策略对螺旋桨轴承载荷的螺旋桨轴承载荷的效果，从分析了旋转条件的标称唤醒，通过不稳定的RANSE模拟与螺旋桨模型计算基于叶片元素理论。考虑的测试用例在 f n = 0.265。 ]]>

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