Offshore Wind Turbine Coupled Motion in Regular Waves

Offshore Wind Turbine Coupled Motion in Regular Waves
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海上风力发电机在规则波浪中的耦合运动

DOI:
10.4031/mtsj.54.2.2
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发表时间:
2020-03
影响因子:
0.8
通讯作者:
She Wen-Xuan
She Wen-Xuan
中科院分区:
工程技术4区
文献类型:
--
作者:
Zhang Bao-Ji;Yu Gao;She Wen-Xuan

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摘要本研究旨在基于计算流体动力学(CFD)理论,准确预测海上风力发电机组的水动力性能和运动响应。控制方程采用连续方程和Navier-Stokes方程, 模型用作湍流模型。采用有限差分法对方程进行离散。控制方程采用SIMPLE算法求解,自由表面采用VOF方法捕捉。 建立了不规则波的数值波浪水槽。研究了规则波作用下海上风力发电机组的水动力性能和运动响应。首先,我们假设一个浮动基础没有旋转风扇的影响,并检查其运动响应 以及5、6、7级三种典型海况下的波浪力。之后,我们用一系列的力和扭矩作用在旋转中心的海上来代替旋转风扇对浮动基础的影响。然后,研究了其水动力性能 在各种海况和三种风速(即5、8和11 m/s)下,受浮式基础叶片旋转的影响。研究结果可为类似结构的水动力性能和运动响应研究提供理论依据和技术支持 海上风力涡轮机。
AbstractThis study aims to accurately predict the hydrodynamic performance and motion responses of offshore wind turbines on the basis of computational fluid dynamics (CFD) theory. Continuous and Navier-Stokes (N-S) equations are employed as control equations, and the k-ε model is used as a turbulence model. The finite difference method is utilized to discretize the equation. The Semi-Implicit Method for Pressure-Linked Equations (SIMPLE) algorithm is applied to solve the control equation, and the volume-of-fluid (VOF) method is used to capture the free surface. The numerical wave tank of irregular wave is also established. The hydrodynamic performances and motion responses of the offshore wind turbines under regular waves are studied. First, we assume a floating foundation without the influence of a rotational fan and examine its motion responses and wave force in three typical sea conditions, namely, Levels 5, 6, and 7. Thereafter, we use a series of force and torque acting on the rotating center of the offshore to substitute for the influence of the rotational fan on the floating foundation. Then, we study the hydrodynamic performance influenced by blade rotation of the floating foundation in various sea conditions and three wind speeds, namely, 5, 8, and 11 m/s. Research results can provide usable theoretical principle and technical support for the investigation of the hydrodynamic performance and motion responses of similar offshore wind turbines.
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