潮流水轮机结构柔性对荷载的影响

Matthias Arnold , Frank Biskup , Po Wen Cheng
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引用次数: 2

摘要

在潮流涡轮机的发展中,有两种关于负载模拟所需的详细程度的常见方法。这两种方法要么是采用计算流体力学(CFD)方法对压力场进行详细模拟,并假设其为刚性几何结构;要么是采用高保真的结构模型,利用半经验叶片单元动量理论对叶片的水动力载荷进行模拟。在本研究中,分析了这种简化以及流固耦合(FSI)对潮流涡轮负荷的影响。基于耦合CFD和多体仿真,对福伊特HyTide®1000-13涡轮的FSI进行了仿真。这种方法可以考虑整个涡轮的详细结构,同时也可以模拟详细的压力场。考虑到塔架、动叶、传动系统和其他部件的结构灵活性,对一个有代表性的运行点进行了瞬态仿真。这种比较用于量化灵活性对负载和性能的单独和综合影响。因此,福伊特HyTide®1000-13涡轮机在本研究中以不同的细节水平进行模拟,以分析潮流涡轮机负载模拟所需的建模细节水平,并增加对潮流涡轮机应用中流体-结构相互作用的理解。
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Impact of structural flexibility on loads on tidal current turbines

In the development of tidal current turbines there are two common approaches regarding the required level of detail for load simulations. Those two are either to simulate the pressure field in detail with computational fluid dynamics (CFD) and assume a rigid geometry or to use a high fidelity structural model and simulate the hydrodynamic blade loads with the semi-empirical blade element momentum theory.

Within the present research this simplification and the impact of fluid–structure-interaction (FSI) on the loads on tidal current turbines are analysed. Based on coupled CFD and multibody simulations the FSI is simulated for the Voith HyTide®1000-13 turbine. This method allows taking the detailed structure of the full turbine into account, while also simulating the detailed pressure field.

Transient simulations of a representative point of operation are performed considering the structural flexibility of the tower, rotor blades, drivetrain and other components. This comparison is used to quantify the individual and combined effect of flexibilities on the loads and performance. Therefore, the Voith HyTide®1000-13 turbine is simulated within this research in varying levels of detail to analyse the required level of modelling detail for load simulations of tidal current turbines and increases the understanding of fluid–structure-interaction in tidal current turbine applications.

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