海上风电结构横风向气动力阻尼特性研究

RESEARCH ON CROSS-WIND AERODYNAMIC DAMPING CHARACTERISTICS OF OFFSHORE WIND TURBINE STRUCTURE

基于横风向气动力阻尼理论计算模型,以NREL-5 MW海上风电机组为例,对其运行过程中横风向气动力阻尼进行计算,并采用FAST软件对计算结果进行验证。之后,研究转速、叶片桨距角和运行方式对横风向气动力阻尼的影响。研究结果表明:NREL-5 MW海上风电机组结构运行状态下的横风向气动力阻尼在0%~0.8%范围内变化,其随风电机组运行转速及叶片桨距角的增大而增大;此外,海上风电机组不同运行方式对其横风向气动力阻尼也会产生较大影响。

Taking the NREL-5 MW offshore wind turbine as an example,the value of cross-wind aerodynamic damping in operational condition was calculated based on the theoretical calculation model and the results were verified by FAST software. Then,the influence of rotor speed,blade-pitch angle and operation mode on the cross-wind aerodynamic damping was studied. The research results show that the cross-wind aerodynamic damping of the NREL-5 MW offshore wind turbine varies from 0% to 0.8% in operational conditions,and it increases with the increase of the rotor speed and blade-pitch angle. In addition,different operation modes of offshore wind turbine will also have an impact on the cross-wind aerodynamic damping.