中文摘要：

为研究冷却塔壁面粗糙度对其绕流特性的影响,该文采用在冷却塔壳外表面粘贴均匀粗糙度壁纸的方法,对某115 m双曲冷却塔1∶150的刚性模型进行风洞测压试验。通过喉部位置风压曲线与规范曲线的吻合程度确定合适粗糙度的壁纸,之后在该目标粗糙度下,对整个模型表面的风压分布特性进行细致研究。结果表明：沿冷却塔子午线方向,平均风压最大负压值出现在喉部位置;阻力系数的大小超出了规范值,并呈现出两端大中间小的特征;同时冷却塔上下两端的平均和脉动风压分布均表现出显著的三维效应,因此进行冷却塔抗风设计时,有必要对端部进行重点加固。

英文摘要：

To study the influence of the roughness of cooling tower surface on the flow characteristics, a rigid model of a hyperbolic cooling tower covered with wallpaper was measured in a wind runnel. The wallpaper was selected by comparing the tested pressure distribution at throat position with that of the load code. Then we studied the wind pressure distribution on the entire model that is covered with the selected wallpaper. The results show that the largest pressure appeared at the throat position. Drag coefficient exceeded the standard value, and was larger at both ends than that in the middle. Mean and fluctuating wind pressure distribution at the edges of the cooling tower shows a significant three-dimensional effect. For cooling tower wind resistance design, it is necessary to focus on the reinforcement of edges.