【摘要】 为了提高Savonius小型垂直式风力机的风能利用率,采用CFD方法研究了在来风方向增加导流板对该垂直式风力机风能利用率的影响。研究中建立了数值计算模型并使用Fluent软件进行仿真分析,比较了有无导流板、不同导流板长度、不同安装角度和不同安装位置情况下叶片周围的流场分布以及叶片对转轴产生的静态力矩。仿真结果表明,增加导流板能够显著提高该型风机叶片对转轴的静态力矩;同时,导流板长度和安装角度对此是重要的影响因素;而在一定范围内,不同导流板位置对静态力矩所带来的影响可以忽略。合理安装导流板可以使得该型风机的叶片静态力矩提高20%~40%,进而提高Savonius型风机的风能利用率。更多还原

【Abstract】 To improve the performance of the Savonius wind turbine,a curtaining arrangement was introduced in previous researches through wind tunnel experiences. As an addition,numerical simulations on more parameters of the curtain have been conducted in this study. A numerical model has been built and simulated with the help of Fluent. Three geometrical parameters,namely installation angle,length of curtain and position of curtain are taken into consideration in this study. Influences of each parameter are analyzed through numerical simulations respectively. Static torques is compared in each case. It is shown that curtain arrangement significantly improves static torque thus the efficiency. Installation angle and length of curtain are important parameters while installation position does not affect much. Curtain arrangement is found as an effective methodology to increase static torque and thus improve mechanical efficiency of Savonius wind turbine.更多还原