平台纵摇对漂浮式风电机组叶片气弹特性的影响研究  

Investigations on the Aeroelastic Characteristics of Floating Offshore Wind Turbine Blades under Platform Pitch Motion

作　　者：李晓辉[1] 王晓东[1] 姚加桂 白雪峰[1] 曹垚鑫 戴丽萍[1] Xiao-hui Li;Xiao-dong Wang;Jia-gui Yao;Xue-feng Bai;Yao-xin Cao;Li-ping Dai(Key Laboratory of CMCPPE Ministry of Education,North China Electric Power University;China Quality Certification Center)

机构地区：[1]华北电力大学电站能量传递转化与系统教育部重点实验室 [2]中国质量认证中心

出　　处：《风机技术》2023年第2期50-54,共5页Chinese Journal of Turbomachinery

基　　金：中国质量认证中心研究项目与国家自然科学基金(No.51576065)。

摘　　要：海上风电向深远海发展,漂浮式风电机组成为发展方向。漂浮式风电机组存在多自由度平台运动,同时伴随海上多变的风况,叶片的气动特性和结构响应非常复杂。本文基于自由涡尾迹法与模态法建立了漂浮式风电机组叶片气弹模型,对NREL 5MW风电机组叶片的气弹特性进行了模拟,与采用BEM和GDW方法的计算结果进行对比。在对比验证的基础上,采用耦合模型研究了平台纵摇运动下NREL 5MW风电机组叶片气弹特性,结果表明,本文建立的耦合模拟方法可以准确地模拟平台运动下的气动性能与结构动态响应;平台运动会显著增加叶片气动性能的波动,平均功率明显增大,平均推力略有降低;平台运动使叶片表面等效应力发生波动,叶尖变形增大,中内叶展较外叶展更容易受到平台运动的影响。With the offshore wind power is developing to the deep sea,the floating wind turbine will be the promising type.The floating wind turbine has multi-degree of freedom platform motion,and due to the variable wind conditions at sea,the aerodynamic characteristics and structural response of the blades are very complex.In this paper,an aeroelastic model of a floating wind turbine blade is established based on the free vortex wake method and modal method,and the aeroelastic characteristics of a NREL 5MW wind turbine blade were simulated.The results were compared with those calculated by BEM and GDW methods.The coupled model was used to study the aerodynamic characteristics of NREL 5MW wind turbine blades under platform pitch motion.After comparative verification,the results showed that the coupled model can accurately simulate the aerodynamic performance and structural dynamic response of the platform motion.Platform motion significantly increases the fluctuation of blade aerodynamic performance,with a significant increase in average power and a slight decrease in average thrust;the platform motion causes fluctuations in the equivalent stress on the blade surface,exacerbating the deformation of the blade tip,and making the inner blade span more susceptible to the influence of platform motion than the outer blade span.

关 键 词：漂浮式 纵摇运动 自由涡尾迹 模态法 气动弹性 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]