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中文摘要：
考虑到处于变速运行阶段的风力机,其叶素的运行攻角并不能保持在单一的设计攻角,翼型多攻角设计逐渐成为复杂风况下提高风能捕获效率的重要手段。该设计方法的关键在于目标函数中多个攻角点及相应权重系数的合理确定。但是,由于缺少对运行攻角分布规律和影响因素的分析,目前目标函数的确定仍依赖工程经验。为此,该文从闭环系统(含风况、风力机和控制器)的视角,基于对最大功率点跟踪控制的动态分析,给出了变速阶段的叶素运行攻角分散分布的机理解释和影响攻角分布的多种因素。并通过Bladed的气动–弹性–伺服仿真,分析了这些因素对运行攻角分布的影响机理和作用规律。将为翼型多攻角设计中优化模型的合理构建提供依据。
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