摘要
为探究翼尖小翼对H型垂直轴风机气动性能的影响规律,采用数值仿真方法,应用商业CFD软件Fluent计算并分析了翼尖涡流对不同展弦比叶片平均升力的影响。同时,用数值仿真方法分析了安装翼尖小翼前后翼尖涡流和叶片升力大小的变化,并通过试验对计算结果进行验证。研究结果表明,H型垂直轴风机叶片的展弦比越小,叶片升力受翼尖涡流的影响越明显;翼尖小翼适用于小展弦比的H型垂直轴风机,可有效削弱翼尖涡流的不利影响,增大叶片升力、提高叶片效率。
In order to study the regular influence of winglet on the H-type VAWT＇s aerodynamic peptone, it applies CFD software Fluent to compute the lift force in different conditions of aspect ratio. Numerical simulation is used to analyze winglet effect on tip vortex and lift force.The conclusion drawn is also proved by experiment. The results show that lower H-type VAWT＇ aspect ratio can generate biggish tip vortex. Winglet which is suitable for lower aspect ratio H-type VAWT, can weaken the adverse effect of tip vortex. Simultaneously, winglet magnifies lift force.
出处
《机械设计与制造》
北大核心
2013年第9期70-72,共3页
Machinery Design & Manufacture
