新建与既有同尺寸冷却塔群风致干扰效应研究

陈德文; 余玮; 王文才; 郝荣荣; 柯世堂

doi:10.3724/j.gyjzG24042815

新建与既有同尺寸冷却塔群风致干扰效应研究

doi: 10.3724/j.gyjzG24042815

1. 山东电力工程咨询院有限公司, 济南 250013;
2. 南京航空航天大学土木与机场工程系, 南京 210016

基金项目:

国家自然科学基金项目(52211530086)

江苏省杰出青年科学基金项目(BK20211518)。

详细信息

作者简介:
陈德文,硕士,高级工程师,主要从事高耸结构研究,chendewen@sdepci.com。

通讯作者:
柯世堂,博士,教授,博士生导师,主要从事结构风工程与风能利用研究,keshitang@163.com。

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- 被引次数: 2
出版历程
- 收稿日期: 2024-04-28
- 网络出版日期: 2025-04-02

Research on the Wind-Induced Interference Effect on New and Existing Cooling Towers of the Same Size

1. Shandong Electric Power Engineering Consulting Institute Co., Ltd., Jinan 250013, China;
2. Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 电厂二次扩建工程会加剧新建和既有冷却塔群的风致干扰效应,而塔群干扰是引起冷却塔风毁倒塌的重要原因之一,现行规范和现有研究忽略了此类情况下冷却塔风荷载极值的取值研究。以广西钦州某电厂新建与既有同尺寸冷却塔群为对象,在既有串列双塔组合的基础上,再考虑新建冷却塔的三塔、四塔组合共240个工况,采用刚体测压风洞试验分析新、老冷却塔表面风压平均和脉动分布特性。在此基础上,以整体阻力系数为准则定量对比分析不同塔群组合形式下新建塔和既有塔的干扰效应,提出了新建和既有冷却塔静力和极值干扰因子,探讨了新建对既有冷却塔表面平均和脉动风压分布的影响机制,建立了新建和既有冷却塔群极值风压取值模型。研究表明:此类同尺寸新建冷却塔(群)对既有冷却塔群之间的干扰效应显著,具体表现为受扰塔来流向侧前方施扰塔的存在加剧了前后塔间的相互干扰效应,受扰塔与干扰建筑布局形成的“夹道效应”增强了干扰效应,其中以“夹道效应”的不利影响尤为显著,既有塔最大极值干扰因子相比增大了7%;三塔组合最不利工况下其静力干扰因子增大8.7%。
- 冷却塔 /
- 塔群组合 /
- 风洞试验 /
- 干扰效应 /
- 作用机理
Abstract: The extension of the power plant will generate the wind-induced interference effect on the new and existing cooling towers, which is one of the important reasons of the failure and collapse of the cooling towers caused by wind. The current code and existing research completely ignore the extreme value of the wind load of the cooling tower in such cases. Taking the new and existing cooling towers of the same size in a power plant in Qinzhou, Guangxi Province as the object, on the basis of the existing tandem two-tower combination, a total of 240 working conditions of the three-tower and four-tower combination of the new cooling tower were considered. The wind tunnel test for rigid body was used to analyze the average wind pressures and pulsation distribution characteristics of these towers. Then based on the overall coefficient of resistance, the interference effects under different tower group combinations were quantitatively compared and analyzed, the static and extreme interference factors of new and existing cooling towers were proposed, the influence mechanism of new towers on the average and fluctuating wind pressure distribution on the surface of existing cooling towers was discussed, and the model of extreme wind pressures for new and existing cooling tower groups was established. It was found that the interference effect of the new cooling towers (groups) of the same size on the existing cooling tower groups was significant, especially when the towers were located along the wind direction. Also the "sandwich effect" formed by the disturbed towers and the disturbing building enhanced the interference effect most significantly, where the maximum extreme interference factor of the existing towers was increased by 7%, and the static interference factor was increased by 8.7% under the most unfavorable working condition of the three-tower combination.
- cooling tower /
- tower group combination /
- wind tunnel test /
- interference effect /
- mechanism of action

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参考文献(25)

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