摘要
垂直轴风力机较低的风能利用率是限制其工程化应用的主要原因,为了提高其风能转化率、降低气动荷载,针对叶尖速比为2.65的中等值条件下带尾缘襟翼的大型垂直轴风力机提出了一种改进的气动性能优化模型,采用SST k-ω湍流模型进行数值模拟.研究结果表明:与原始模型相比,考虑桨距和襟翼协同运动下优化模型的功率系数可提高12.2%;此外,桨距和襟翼的协同运动可以显著减少作用在风力机整机上的推力和侧向力,与原始模型相比分别减少了12.4%和7.5%,推力和侧向力的波动幅值也要明显低于原始模型,这将有助于降低作用在风力机整机上的疲劳荷载.该模型有望在兆瓦级大型垂直轴风力机上得到应用.
Low power efficiency is a critical factor that restricts the engineering application of the vertical axis wind turbine(VAWT).In order to improve the efficiency of VAWT and reduce aerodynamic load,an improved aerodynamic performance optimization model for a large VAWT with trailing edge flaps at a medium tip speed ratio(TSR=2.65)is proposed.A numerical simulation is conducted using the SST k-ωturbulence model.The results indicate that compared with the base model,the power coefficient of the model under the synergic motion of pitch and flap can be increased by 12.2%.In addition,the synergic motion of pitch and flap can significantly reduce the thrust and lateral force on the VAWT,which are reduced by 12.4%and 7.5%respectively compared with the base model.The load fluctuation of thrust and lateral force is also significantly lower than that of the base model,which is helpful to reduce the fatigue load on wind turbine.This model is expected to be applied to MW-level VAWT.
作者
陈昊
戴孟祎
韩兆龙
周岱
包艳
涂佳黄
CHEN Hao;DAI Mengyi;HAN Zhaolong;ZHOU Dai;BAO Yan;TU Jiahuang(School of Naval Architecture,Ocean and Civil Engineering,State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Key Laboratory of Hydrodynamics of the Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Key Laboratory of Digital Operation and Maintenance of Public Buildings and Infrastructure,Shanghai Jiao Tong University,Shanghai 200240,China;Institute of Polar and Ocean Technology,Institute of Marine Equipment,Shanghai Jiao Tong University,Shanghai 200240,China;College of Civil Engineering and Mechanics,Xiangtan University,Xiangtan 411105,Hunan,China)
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2023年第6期642-652,共11页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金(52122110,42076210,51879160)
上海市科委重大研究计划(2019-01-07-00-02-E00066)
上海市曙光计划(19SG10)
上海交通大学深蓝计划(SL2020PT201,SL2021PT302)
湖南省自然科学基金(2021JJ50027)。
关键词
大型垂直轴风力机
可变桨距
可变尾缘襟翼
数值模拟
large vertical axis wind turbine(VAWT)
variable pitch
variable trailing edge flap
numerical simulation
