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首页> 外文会议>International Symposium on Natural Draught Cooling Towers; 20040520-22; Istanbul(TR) >Provision for interference effects in non-symmetric design of cooling towers
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Provision for interference effects in non-symmetric design of cooling towers

机译：冷却塔非对称设计中的干扰效应规定

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The flow around cooling towers is modified by adjacent large buildings such as boiler houses, other cooling towers etc. The flow interference can shelter the CT or can amplify the wind load. Typically, the additional vorticity coming from an upwind neighbour increases the buffeting of the CT. As well, the mean flow speed may increase and create a higher mean wind load. The effect has been studied in wind tunnel tests. Elastic models have been used in order to measure the shell response. The experiments have shown that the extreme shell stresses can be amplified considerably compared to the isolated tower, in very unfavourable conditions by more than 50%. But even for typical situations, the increase can amount to 30% and must be taken into account in the design. It depends on the distance to and the shape of the neighbour, but particularly on the flow direction. Based on the latter observation it seems natural to provide additional reinforcement of the CT only in those sectors for which interference increases the wind load effect. Various approaches to account for interference effects are discussed in this paper.
机译：冷却塔周围的流量被相邻的大型建筑物（例如锅炉房，其他冷却塔等）修改。流量干扰可以遮盖CT或放大风量。通常，来自上风邻居的额外涡度会增加CT的抖振。同样，平均流速可能增加并产生更高的平均风载荷。在风洞测试中已经研究了这种效果。为了测量壳体响应，已经使用了弹性模型。实验表明，与孤塔相比，在非常不利的条件下，极端的壳应力可以大大放大50％以上。但是即使在典型情况下，这种增加也可能达到30％，并且在设计中必须予以考虑。它取决于到邻居的距离和形状，尤其取决于流动方向。根据后面的观察结果，似乎自然而然地仅在干扰会增加风荷载效应的那些区段中对CT进行额外的加固。本文讨论了解决干扰影响的各种方法。

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