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本文研究了由于风力机叶片安装角的随机误差而导致的失谐问题。将某兆瓦级三叶片风力机的某一叶片安装角作为随机变量,采用一种不确定性量化方法——非嵌入式概率配置点法(NIPRCM)对CFD计算结果进行统计特性分析,讨论此失谐叶片对流场及风力机气动特性产生的影响。结果表明,由于安装角误差导致的失谐叶片会影响其上下游叶片绕流场,且对下游叶片绕流场的影响更明显。安装角的正负偏差引起的叶片载荷变化幅度具有不对称性,且失谐叶片的自身载荷变化方向与其上下游叶片载荷变化方向相反。
This paper studies the detuning problem caused by the random error of wind turbine blade installation angle. Taking a blade mounting angle of a three-megawatt three-blade wind turbine as a random variable, a non-deterministic quantification method (NIPRCM) is used to analyze the statistical characteristics of the CFD calculation. Influence of Detuning Blade Convection Field and Aerodynamic Characteristics of Wind Turbine. The results show that the detuning blades due to the installation angle error affect the flow field around the upstream and downstream blades, and the influence of downstream blades around the flow field is more obvious. The variation of blade load caused by positive and negative deviation of installation angle has asymmetry, and the change direction of detuning blade’s own load is opposite to the change of blade load on its upstream and downstream.