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以某33 k W风力机为研究对象,分别以雷诺模型法和运动相似关系建立缩比模型,进行三维定常数值计算,分析相似工况点上叶片表面流动情况和气动性能参数。结果表明,采用雷诺模型法,风力机缩比模型的叶片表面流动情况及叶片展向截面压力系数均与原型相似,力特性参数换算结果的相对误差均在2%以内。采用雷诺模型法可节省仿真时间和计算资源,有效估算原型风力机气动特性。
Taking a 33 kw wind turbine as the research object, the model of reduction ratio was established by the Reynolds-Model method and the similarity of motion respectively. The three-dimensional steady-state numerical calculation was carried out, and the flow and aerodynamic performance parameters of blade surface under similar conditions were analyzed. The results show that the blade surface flow and blade cross-section cross-section pressure coefficient are all similar to the prototype using the Reynolds-averaged model, and the relative error of the force characteristic parameter conversion results are all within 2%. The use of Renault model method can save simulation time and computing resources, and effectively estimate the aerodynamic characteristics of the prototype wind turbine.