CAJ | 학술논문

垂直轴风力机气动性能研究是风力机设计、实验的重要部分，对其运动状态下的流场进行分析是观测垂直轴风力机性能重要环节。基于 NACA0012对称翼型，建立二维几何模型并进行模拟计算。采用 k－ω SST 湍流模型及滑移网格技术，通过 CFD 软件数值计算得到达里厄型直叶片垂直轴风力机运行时周边流场分布情况。通过比较不同方位角下流场涡量以及升、阻力系数得出：在方位角为105°附近时，翼型下表面产生流动分离，并导致失速；下风区翼型运行的流场由于受到上风区尾流的影响，翼型周围没有产生明显的流动分离。
수직축풍력궤기동성능연구시풍력궤설계、실험적중요부분，대기운동상태하적류장진행분석시관측수직축풍력궤성능중요배절。기우 NACA0012대칭익형，건립이유궤하모형병진행모의계산。채용 k－ω SST 단류모형급활이망격기술，통과 CFD 연건수치계산득도체리액형직협편수직축풍력궤운행시주변류장분포정황。통과비교불동방위각하류장와량이급승、조력계수득출：재방위각위105°부근시，익형하표면산생류동분리，병도치실속；하풍구익형운행적류장유우수도상풍구미류적영향，익형주위몰유산생명현적류동분리。
Aerodynamic performance analysis is very important during vertical axis wind turbine(VAWT)design and experiments.The analysis of dynamic flow field is also important to test the performance of one VAWT.A two-dimensional interaction model is constructed to simulate the NACA0012 symmetric airfoil.By using k-ω SST turbulence model and sliding meshes,the distribution of fluid field around Darrieus straight-blades VAWT during runtime is obtained with the CFD software.By analyzing the velocity and vorticity of the airfoil at different azimuth,it is found that the flow separation generates at the azimuth of 105°,which leads to stall.Due to the influence of the wake at the up wind on the airfoil flow field at the down wind,the flow separation is not observed.