浮式风力机横荡运动下气动特性分析  

AERODYNAMIC PERFORMANCE OF FLOATING OFFSHORE WIND TURBINE UNDER PLANTFORM SWAY MOTION

作　　者：黄亚振 陈嘉佳 沈昕[1,2] 吴亚东[1,2] 田杰[1,2] Huang Yazhen;Chenjiajia;Shen Xin;Wu Yadong;Tianjie(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Engineering Research Center of Gas Turbine and Civil Aero Engine Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]上海交通大学燃气轮机与民用航空发动机教育部工程研究中心,上海200240

出　　处：《太阳能学报》2021年第9期279-285,共7页Acta Energiae Solaris Sinica

基　　金：上海市浦江人才计划(2019PJD020)。

摘　　要：浮式平台的横荡运动会影响到风力机相对入流速度以及叶轮-尾流的相互作用,导致浮式风力机的气动特性更为复杂。基于升力面自由尾迹模型,以NREL 5 MW全尺寸浮式风力机作为研究对象,分析在横荡运动下浮式风力机整机性能以及叶片非定常气动特性,并探究其作用机理。研究表明,横荡运行下,远场尾迹对叶片的诱导作用减小,整机的功率及推力略有提升;横荡速度附加在旋转方向上导致功率及推力与横荡运动存在一定的相位差;叶片上切向力及法向力呈现不同的分布,频率为横荡运动的2倍,叶片变形会相应增大,叶尖与塔架碰撞风险增大。Due to the sway motion of the floating platform,the aerodynamics of floating wind turbines is highly complex compared to the fixed based wind turbines.In the present paper,a lifting surface method with free wake model was developed to study the unsteady aerodynamic performance of the NREL 5 MW floating wind turbine under prescribed sway motions.The results showed that under platform sway motion,the induced velocity from the free wake decreased and both the power output and the rotor thrust level increased compared to the fixed based wind turbine.The variation of the root load on the blade showed a two times frequency on the sway motions.The increased load on the blade may increase the possibility of the collision between the blade tip and the tower.

关 键 词：海上风力机 浮式平台 升力面理论 非定常气动性能 横荡 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]