CAJ | 학술논문

针对后掠式风力机叶片，以提高输出功率为目标，将三次样条函数在风扇叶片中的应用类比到风力机叶片上，运用一种新型积叠线设计后掠式叶片。以1．5 MW风力机直叶片为原型，将其后50％段叶展按样条函数作后掠变形，建立了后掠式叶片模型，对叶片流场进行网格化分并转化成多面体，通过三维定常气动数值模拟计算，得到了直叶片与后掠叶片在4～12 m/s共9种风速下的有效转矩，并计算和对比了直叶片原型风力机与后掠式叶片风力机年平均输出功率。计算结果表明：后掠式风力机比原型机的年平均输出功率增长了1．13％，说明了基于三次样条函数的后掠式叶片气动外形设计取得了一定效果，文中采用的类比设计方法为风力机叶片设计提供了一种新思路。
침대후략식풍력궤협편，이제고수출공솔위목표，장삼차양조함수재풍선협편중적응용류비도풍력궤협편상，운용일충신형적첩선설계후략식협편。이1．5 MW풍력궤직협편위원형，장기후50％단협전안양조함수작후략변형，건립료후략식협편모형，대협편류장진행망격화분병전화성다면체，통과삼유정상기동수치모의계산，득도료직협편여후략협편재4～12 m/s공9충풍속하적유효전구，병계산화대비료직협편원형풍력궤여후략식협편풍력궤년평균수출공솔。계산결과표명：후략식풍력궤비원형궤적년평균수출공솔증장료1．13％，설명료기우삼차양조함수적후략식협편기동외형설계취득료일정효과，문중채용적류비설계방법위풍력궤협편설계제공료일충신사로。
To improve the wind turbine output power,a cubic spline function is applied to the aft-swept wind turbine blade based on the analogy design,which is also applied in fan blade.Using the 1.5MW wind turbine straight blade as the prototype, a aft-swept blade model is created with sweeping back the prototype platform from its 50%region to tip.After the division of the flow field grid and transformation into polyhedra , the three-dimension aerodynamic numerical simulation calculation is car-ried out, and the effective torques of straight blade and aft-swept blade at 4~12 m/s wind speeds adding up to 9 kinds are obtained respectively .Moreover , the annual average output powers of aft-swept blade wind turbine is calculated and compared with that of straight blade wind turbine.The results show the aft-swept blade turbine improves annual energy capture over the prototype by increasing 1.13%, which reflects that the aft-swept shape design based on cubic spline function is effective and analogy method can provide a new idea for the wind turbine blade design.