摘要
随着深水浮式海上风电场在世界范围内的兴起,浮式平台运动性能对风力机稳定运行及叶片气动载荷影响的研究具有重要意义。基于三维粘性不可压缩Navier-Stokes方程和适用于旋转流场分析的重整化群k-ε(RNG)湍流模型,数值模拟美国可再生能源实验室(NREL)5MW海上风力机的气动性能,并将数值模拟结果与NREL的设计参考数据进行对比分析,较好地验证了该数值模拟方法的有效性。进一步利用滑移网格技术模拟风力机叶片随浮式平台的典型周期性运动,实现浮式风力机叶片与周围流场的复杂非线性流固耦合分析,分别研究浮式平台不同运动幅值和运动周期对风力机叶片气动性能的影响规律,并从物理机理角度进行阐明分析。本文的主要研究成果,将对未来大型深水浮式海上风力机的气动性能分析及浮式平台系统的运动性能设计起到积极的指导作用。
As the development of the deep-water floating offshore wind farm has becoming more and more promising around the world, the study of the motion effect of floating platform on both the steady opera- tion performance of the wind turbine and the aerodynamic loads analysis of the blade is of great impor- tance. Based on three dimensional Navier-Stocks equation and k-e Renormalization Group Method （RNG） turbulence model,which is very suitable for the rotational fluid flow,numerical simulations for the aerodynamic performance of National Renewable Energy Laboratory （NREL） of us 5MW offshore wind turbine blades have been done. The availability of the numerical model has been verified by compa- ring the numerical results with the corresponding design data from NREL. Furthermore, the complex nonlinear fluid-structure interaction between the blades and its surrounding airflow has been successfully investigated by using advanced sliding mesh technique to simulate the typical periodic motion of the floating platform. The effect of different motion amplitudes, and the effect of different motion periods have been studied. As a result, the law of the effects has been clarified in the view of physical mecha- nism. In summary,the main results of this work would play an active role in both the aerodynamic analy- sis of large floating offshore wind turbine and the motion performance design of the supporting floating platform.
出处
《计算力学学报》
CAS
CSCD
北大核心
2014年第1期91-95,共5页
Chinese Journal of Computational Mechanics
基金
国家重点基础研究发展计划(2011CB013703)
国家自然科学基金创新研究群体(50921001)资助项目
关键词
浮式海上风力机
气动性能
滑移网格
流固耦合
floating offshore wind turbine
aerodynamic performance
sliding mesh
fluid-structure inter action
