Fluid-structure coupling for the stability and energy performance of a wind turbine with hyper- flexible blades, under different hydrodynamic flow reg

为了了解和预防近海环境中风力涡轮机故障的风险，开展多尺度和多学科的研究至关重要，其中包括风与单个涡轮机的相互作用以及涡轮机之间的相互作用。因此，需要优化每个涡轮机之间的距离，以减少涡轮机对下游其他涡轮机的湍流影响，并且需要对涡轮机的设计(或重新设计)进行更多研究，包括正在变得更长、更细和更灵活的叶片。最近的研究强调，使用柔性叶片可以极大地提高风力涡轮机的效率。该项目将有两个主要目标。一是建立三维流固耦合(FSI)数值模型，研究超柔性风力机叶片的载荷效应和稳定性。该模型将风力机叶片的结构柔性状态与周围流体在不同流动条件下的流动相耦合，包括风速和风向。第二个目标是用数值方法研究“超”柔性叶片风力涡轮机的尾流效应。FSI的移动浸没边界方法(MIBM)将被应用。这种方法考虑了运动叶片的真实形状，克服了湍流模型的局限性，并高精度地表征了旋翼下游的旋涡结构。

To understand and prevent the risk of wind turbine failure in an Offshore environment, it is critical to carry out multi-scale and multidisciplinary studies, which include the interaction of wind with a single turbine and also the interactions between turbines. The distance between each turbine thus needs to be optimised to reduce turbulence effects from turbines on others located downstream, and more research is required for the design (or re-design) of the turbines, including the blades which are becoming longer, slimmer and more flexible. Recent research has highlighted that using flexible blades for wind turbines can dramatically increase their efficiency. The project will have two main objectives. The first one is to develop a 3D fluid-structure interaction (FSI) numerical model to investigate loading effects and stability for 'hyper'-flexible wind turbine blades. This model will couple the structural flexible state of the wind turbine blades and the surrounding fluid flow under various flow conditions, including wind velocity and direction. The second objective will be to numerically investigate wake effects for 'hyper'-flexible blades-based wind turbines. A Moving Immersed Boundary Method for FSI (MIBM) will be applied. This method accounts for the real shape of the moving blades, to overcome turbulence models limitations, and to characterize with high accuracy the vortex structures downstream of the rotor.