基于多种UDF方法的变桨距垂直轴风力机性能分析
DOI: 10.6041/j.issn.1000-1298.2012.09.023, PP. 120-124
Keywords: 变桨距,垂直轴风力机,风能利用率,用户定义函数
Abstract:
为了提高垂直轴风力机的性能，针对变桨距垂直轴风力机，利用叶素理论求得叶片在不同方位桨距角的变化规律，使叶片在各个不同位置升力系数达到最大；通过滑移网格、动网格、滑移网格动网格组合等动区域方法的研究，实现了变桨距垂直轴风力机主动控制数值模拟方法的多元化;最终获得不同叶片各自产生的总力矩和风能利用率。用垂直轴风力机的试验和模拟对比分析，验证了数值模拟结果的可靠性。结果表明，采用变桨控制规律的垂直轴风力机，提高了风力机的风能利用率，尤其是在低尖速比情况下，很大程度上改善了风力机的起动性能，尖速比为1.5、2.0、2.5时，相对定桨距风力机功率都增大90%左右。
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