文章摘要
吴云柯.兆瓦级H型垂直轴风力发电机气动设计方案的数值模拟研究[J].热能动力工程,2019,34(6):155-
兆瓦级H型垂直轴风力发电机气动设计方案的数值模拟研究
Numerical Study on the Aerodynamics Design for MW-Level H-Type Vertical Axis Wind Turbine
  
DOI:
中文关键词: 兆瓦级垂直轴风力发电机  气动设计  升力线模拟
英文关键词: MW-level VAWT,Aerodynamics design,LLS simulation
基金项目:国家自然科学基金(51276008)
作者单位
吴云柯 北京航空航天大学 航空发动机气动热力国防科技重点实验室北京100191 
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中文摘要:
      为解决兆瓦级H型垂直轴风力发电机气动设计过程中实验和数值模拟方面耗费巨大的问题,基于升力线模拟方法完成了兆瓦级H型垂直轴风力发电机的气动设计,并利用该方法研究不同垂直轴风力机翼型设计方案对整机气动性能的影响,研究结果表明:基元翼型选用NACA0015和NACA0018对称翼型能够获得更高的风能利用率;整机叶片造型方案中,前掠翼型性能优于直叶片,前掠翼型方案的最大风能利用率随掠角增大而小幅上升,完整旋转周期内的风能利用率则随掠角增加先增大后减小,且在掠角3°时可取到整体最大风能利用率;后掠翼型性能差于直叶片,风能利用系数随掠角增大而减小;前掠与后掠组合翼型方案性能稍好于直叶片,但不如前掠叶片;不同方案之间存在性能差异的原因可能在于不同翼型的叶片分离涡在竖直方向上的旋涡脱落顺序方面存在差异,其中上部较早脱落的前掠方案有助于风能利用系数提升,下部较早脱落的后掠方案则会对风能利用系数产生负面影响。
英文摘要:
      In order to solve the enormous cost problem of experimental test and numerical simulation in the aerodynamic design of MW-level vertical axis wind turbine (VAWT),this paper presents a basic procedure of aerodynamics design for the MW-level VAWT.Using the LLS method,different air foils and blade design schemes are studied.It is concluded that: symmetrical airfoil like NACA0015 and 0018 is better than non-symmetrical airfoil in H-type VAWT.The performance of forward-swept airfoil is better than that of straight blade under the same conditions,and the wind energy utilization coefficient increases slightly with the sweep angle.The performance of backward-swept airfoil is worse than that of straight blade,and the wind energy utilization coefficient decreases with the increase of sweep angle.The performance of forward-swept and backward-swept combined airfoil is slightly better than that of straight blade,but not as good as that of forward-swept blade.The performance difference of different schemes may be due to the different shedding order of blade shedding vortices of different airfoils.The upstream shedding vortices may affect the aerodynamic performance of downstream blades slightly.
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