CAJ | 학술논문

针对传统垂直轴风力机效率低的缺陷,阐述带导叶垂直轴风力机的结构优势,并分析导叶对涡轮型垂直轴风力机的作用。应用计算流体力学理论,在设计风速12 m/s下,采用滑移网格技术及k-着模型对有、无导叶两种涡轮型垂直轴风力机的气动性能进行比较。研究表明,导叶可以有效降低由于来流对逆风区叶片吸力面的直接冲击而造成的阻力扭矩,也会负面影响顺风区叶片的性能,但其负作用效果远不及在逆风区挡流降阻的正作用效果,故加导叶后风轮的性能会有很大提高。带弧线形导叶涡轮型垂直轴风力机最大风能利用系数可达0.24,具有工作范围广、最佳尖速比大的特点。
침대전통수직축풍력궤효솔저적결함,천술대도협수직축풍력궤적결구우세,병분석도협대와륜형수직축풍력궤적작용。응용계산류체역학이론,재설계풍속12 m/s하,채용활이망격기술급k-착모형대유、무도협량충와륜형수직축풍력궤적기동성능진행비교。연구표명,도협가이유효강저유우래류대역풍구협편흡력면적직접충격이조성적조력뉴구,야회부면영향순풍구협편적성능,단기부작용효과원불급재역풍구당류강조적정작용효과,고가도협후풍륜적성능회유흔대제고。대호선형도협와륜형수직축풍력궤최대풍능이용계수가체0.24,구유공작범위엄、최가첨속비대적특점。
To overcome the problem of low efficiency of the traditional vertical axis wind turbine, the structural advantages of the wind turbine with guiding vanes are introduced and the effects of guiding vanes on the vortex vertical axis wind turbine are analyzed in detail. Based on computational fluid dynamics theory, the slippage mesh technique and the k-ε model were used to compare the aerodynamic performance of the vortex vertical axis wind turbine with and without guiding vanes at a design velocity of 12 m/s. Studies have shown that the guiding vanes can effectively prevent the direct impact of the coming flow from acting on the suction section of the blade in the upwind area so as to decrease the drag torque, while the guiding vanes also negatively affect the performance of blades in the downwind area, but the positive effect of the former is more significant, so the performance of a wind turbine with guiding vanes greatly improves. The vortex vertical axis wind turbine with arc-type guiding vanes has a wider operating range, higher optimum tip speed ratio, and higher aerodynamic efficiency. The maximum wind power coefficient can reach 0.24 .