偏心风轮结构对垂直轴风力机气动特性影响数值模拟  

Numerical simulation on aerodynamic characteristics of vertical axis wind turbine with eccentric rotor structure

作　　者：李岩[1,2] 吴志诚 田川公太朗 冯放[2,4] 张婷婷 白荣彬[2] 李建业[2] LI Yan;WU Zhicheng;TAGAWA Kotaro;FENG Fang;ZHANG Tingting;BAI Rongbin;LI Jianye(Engineering College,Northeast Agricultural University,Harbin,Heilongjiang 150030,China;Heilongjiang Province Key Laboratory of Technology and Equipment for Utilization of Agricultural Renewable Resources in Cold Region,Harbin,Heilongjiang 150030,China;Faculty of Regional Sciences,Tottori University,Tottori 6808552,Japan;College of Sciences,Northeast Agricultural University,Harbin,Heilongjiang 150030,China)

机构地区：[1]东北农业大学工程学院,黑龙江哈尔滨150030 [2]寒地农业可再生资源利用技术与装备黑龙江省重点实验室,黑龙江哈尔滨150030 [3]日本鸟取大学地域学部,日本鸟取6808552 [4]东北农业大学理学院,黑龙江哈尔滨150030

出　　处：《排灌机械工程学报》2018年第5期413-419,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：黑龙江省教育厅科学技术研究项目(12541012)

摘　　要：为了改善垂直轴风力机气动特性,提出了一种具有偏心结构的直线翼垂直轴风力机风轮形式,通过增大叶片气动力对转轴的作用半径来改善风力机的起动性能和提高输出功率特性.以采用NACA0018翼型的3叶片风力机为对象,利用数值模拟方法计算了具有6种不同偏心量风轮结构的风力机静态起动力矩系数和输出功率系数,分析了不同偏心量对风力机气动特性的影响规律.计算结果表明:适当的偏心量可消除在某些方位角处的反向力矩,使静态力矩系数波动变得平滑,从而有效改善直线翼垂直轴风力机整体起动性能.同时,适当的偏心量还可有效提高风力机的输出功率特性,最大功率系数可提高12%.A rotor with eccentric structure was proposed in order to improve the performance of straight-bladed vertical axis wind turbine(SB-VAWT).Then,the self-starting capacity and output power were enhanced by increasing the effective acting radius of blade on the rotor shaft.Numerical simulations were carried out on a SB-VAWT rotor with six eccentricities,respectively.NACA0018 airfoil was used as rotor blade section profile.The starting torque and power coefficients were predicted.The effects of eccentricity on the aerodynamic performance were analyzed.The simulated results show that a proper eccentricity can diminish negative starting torque coefficient in some degrees at a few azimuth angles,resulting in a smooth torque coefficient curve.Consequently,the starting performance of SB-VAWT is improved effectively.Furthermore,a suitable eccentricity can increase the rotor output po-wer,and the maximum power coefficient can be raised as high as 12%compared with an ordinary rotor.

关 键 词：垂直轴风力机 偏心风轮 起动性 气动特性 数值模拟 

分 类 号：S277.9[农业科学—农业水土工程]