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作 者:冯凯 潘刘诚 钟伟[1] 王同光[1] FENG Kai;PAN Liucheng;ZHONG Wei;WANG Tongguang(Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
机构地区:[1]南京航空航天大学江苏省风力机设计高技术研究重点实验室,江苏南京210016
出 处:《新能源科技》2025年第2期19-29,共11页New Energy Science and Technology
基 金:国家重点研发计划资助(2022YFE0207000)。
摘 要:文章针对不同缩比系数的风力机二维翼型和三维叶片,采用基于SST模型的全湍流模拟和基于Transition SST模型的转捩模拟开展了气动特性的仿真分析。S809、DU 30、DU 40钝尾缘等三种翼型的全湍流模拟结果显示,缩比系数减小,升力系数减小,阻力系数增大,失速迎角提前。转捩模拟下,不同翼型表现出不同的缩比特性:S809翼型在4°迎角前,小缩比模型升力系数会随迎角增大而有所下降;DU 30翼型缩比系数大于0.3的模型与原模型升阻力系数相近,缩比系数小于0.2的模型升力系数则随缩比系数减小而减小,阻力系数随缩比系数减小而增加;DU 40钝尾缘翼型在缩比系数大于0.2时的升力系数都高于原模型,阻力系数都低于原模型,0.1倍缩比模型反之。对于NREL PhaseⅥ风力机叶片,全湍流模拟显示,随着缩比系数的减小,叶片吸力面的流动分离区域延展向不断扩展;转捩模拟显示,原模型的叶片压力面和吸力面都产生了分离泡,随着缩比系数的减小,分离泡不断增大,0.1倍缩比模型的吸力面分离泡消失,发生显著的气流分离。This article conducts aerodynamic characteristic simulation analysis on two-dimensional airfoils and three-dimensional blades of wind turbines with different scaling factors,employing full turbulence simulations based on the SST model and transition simulations based on the Transition SST model.The results of full turbulence simulations on three airfoil types,S809,DU 30,and DU 40 blunt trailing edge,show that as the scaling factor decreases,the lift coefficient decreases,the drag coefficient increases,and the stall angle of attack becomes lower.Under transition simulations,different airfoils exhibit varying scaling characteristics:The S809 airfoil shows that for angles of attack below 4°,the lift coefficient of the smaller scaled model decreases with increasing angle of attack;the DU 30 airfoil’s drag and lift coefficients are similar to those of the original model when the scaling factor is greater than 0.3,but the lift coefficient decreases and the drag coefficient increases with the scaling factor when it is less than 0.2;for the DU 40 blunt trailing edge airfoil,the lift coefficient is higher and the drag coefficient is lower than those of the original model when the scaling factor is greater than 0.2,but the opposite is true for the 0.1 scaled model.For the NREL PhaseⅥwind turbine blade,full turbulence simulations show that as the scaling factor decreases,the separation region on the blade’s suction side extends further;transition simulations show that separation bubbles occur on both the pressure side and the suction side of the original model,and these bubbles grow larger as the scaling factor decreases,with the 0.1 scaled model experiencing increased flow separation and the disappearance of the suction side separation bubble.
关 键 词:水平轴风力机 翼型 缩比效应 转捩 计算流体力学
分 类 号:TB332[一般工业技术—材料科学与工程]
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