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为研究风电机组塔筒结构的气动力特性,基于ANSYS软件,建立了塔筒结构的简化模型并对其进行绕流风场的数值模拟分析,主要探讨了塔筒结构表面风压分布特征,风场风速、湍流度及不同高度比对塔筒表面风压分布的影响.结果显示,圆锥塔筒结构背风面在绕流作用下沿高度方向由上向下形成连续几个回流区,导致背风面受到正压作用;不同风速只有对塔筒背风表面压力大小有较之明显影响,而对塔筒迎风面及侧风面压力大小影响很小;湍流强度对模型表面风压系数大小有不同程度的影响,随着湍流强度的增加,模型侧面(大部区域)、背风表面的压力绝对值相应减小;不同高度比对模型表面风压分布有显著影响.研究结论可为风力发电机塔筒结构的设计提供参考.
In order to study the aerodynamic characteristics of the wind turbine tower structure, a simplified model of the tower structure is established based on ANSYS software and numerical simulation analysis of the wind field around the tower structure is carried out. The wind pressure distribution on the surface of the tower structure is mainly discussed. Wind speed, turbulence and different height ratio on the wind pressure distribution on the tower surface.The results show that the conical tower structure leeward surface in the direction of flow around the height from the bottom to form several continuous reflux zone, resulting in the leeward surface The effect of different wind speeds on the leeward surface pressure of tower is more obvious than that of tower leeward, but it has little effect on the pressure on the windward and crosswind of the tower. The turbulence intensity has different influence on the surface wind pressure coefficient , With the increase of turbulence intensity, the absolute value of the pressure on the leeward side decreases correspondingly on the model side (most area), and the different height ratio has significant effect on the surface air pressure distribution of the model.The conclusions of this study can be used for the wind turbine tower structure Design for reference.