基于叶素理论及 CFD 的中扬程风力提水机的 低实度高效风轮设计

为了降低风力提水机的起动风速,解决传统风力提水机多叶片大实度、风能利用系数低的缺点,采用叶素理论对风力提水机叶片的气动外形进行设计,引入了修正因子,并根据工程实际优化了叶片的弦长以及安装角;采用CFD方法对风轮进行数值模拟,通过分析证明所设计的风力提水机能在2.5m/s的微风下起动,在额定工况下风能利用系数高达0.46,叶片具有很好的三维流动特性,气流流动稳定无脱流,具有中扬程、低实度、低风速起动进行提水作业的优点,扩大了风能的利用范围。

Design of the efficient rotor with low compaction for middle2head wind2driven water pump based on blade element theory and CFD

In order to reduce the threshold wind velocity of wind2driven water pump and improve the disadvantages of multiple blade, large compaction, and low wind power coefficient in the traditional wind 2driven water pump, the blade element theory was used to design the aerodynamic shape of blades in the wind2driven water pump. The correction factor was introduced, and the chord length and setting angle of the blade were optimized. The CFD method was used to perform numerical simulation of the water pump. The results showed that the designed wind2driven water pump can start at a rate of 215 m/ s under the breeze con2 dition, and the wind power coefficient can reach 0146. The blade has great three 2dimensional flowing characteristics and the air is stable without flow separations under certain condition. The designed wind 2driven water pump advantages of middle head, low compaction, and low starting wind speed, which can expand the scope of wind energy utilization.