EFD and CFD for KCS heaving and pitching in regular head waves
EFD and CFD for KCS heaving and pitching in regular head waves
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DOI：
10.1007/s00773-013-0219-0
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发表时间：
2013-04
影响因子：
2.6
通讯作者：
C. Simonsen;J. Otzen;S. Joncquez;F. Stern
中科院分区：
文献类型：
--
作者：
C. Simonsen;J. Otzen;S. Joncquez;F. Stern
采用EFD和CFD方法对KCS集装箱船在静水和规则顶浪中的运动进行了研究。实验研究是在丹麦FORCE技术公司的拖曳水池中进行的，计算流体动力学研究是使用URANS程序CFDSHIP-IOWA和Star-CCM+以及势流理论程序AEGIR进行的。为了研究船舶在共振和最大激振条件下的波浪响应，研究了三种航速和波浪条件。在实验中，垂荡和纵摇运动和阻力一起测量的波来波的波高。模型试验的设计和进行，以使UA评估的测量数据。结果表明，当满足共振和最大激振条件时，船舶响应强烈。关于实验不确定性，平静水域的水平与机动测试的PMM不确定性相当，而波浪中的水平更高。关于CFD结果，计算显示出非常复杂且随时间变化的流态。对于积分量，EFD和CFD之间的比较表明，计算的运动和阻力在平静的水是公平的协议与测量。在波浪中，运动仍然与测量数据相当一致，但观察到阻力有较大差异。平均阻力是合理的，但阻力时间历程的一阶振幅被CFD低估。最后，它似乎是在更接近的协议与测量相比，潜在的理论。
The KCS container ship was investigated in calm water and regular head seas by means of EFD and CFD. The experimental study was conducted in FORCE Technology’s towing tank in Denmark, and the CFD study was conducted using the URANS codes CFDSHIP-IOWA and Star-CCM+ plus the potential theory code AEGIR. Three speeds were covered and the wave conditions were chosen in order to study the ship’s response in waves under resonance and maximum exciting conditions. In the experiment, the heave and pitch motions and the resistance were measured together with wave elevation of the incoming wave. The model test was designed and conducted in order to enable UA assessment of the measured data. The results show that the ship responds strongly when the resonance and maximum exciting conditions are met. With respect to experimental uncertainty, the level for calm water is comparable to PMM uncertainties for maneuvering testing while the level is higher in waves. Concerning the CFD results, the computation shows a very complex and time-varying flow pattern. For the integral quantities, a comparison between EFD and CFD shows that the computed motions and resistance in calm water is in fair agreement with the measurement. In waves, the motions are still in fair agreement with measured data, but larger differences are observed for the resistance. The mean resistance is reasonable, but the first order amplitude of the resistance time history is underpredicted by CFD. Finally, it seems that the URANS codes are in closer agreement with the measurements compared to the potential theory.