东南大学学报（英文版）2021，Vol.37Issue(4)：413-420,8.DOI:10.3969/j.issn.1003-7985.2021.04.011
基于湍流强度效应的冷却塔表面风荷载经验公式修正
Updating empirical results of wind loads on cooling towers for turbulence intensity effects
摘要
Abstract
Variations of wind effects on large cooling towers observed at different turbulence intensities for our previous full-scale measurements might be caused by the inherent uncertainties in our physical experiments.Accordingly,the one-way analysis of variance (ANOVA) technique is employed for analyzing the data measured on the prototype Pengcheng cooling tower.Because ANOVA indicates that the variations of full-scale wind effects are basically the effects of turbulence intensity,the empirical results of wind loads on cooling towers obtained by generalizing physical experimental data without considering the turbulence intensity effects are updated using model test results obtained in multiple flow fields.The empirical fluctuating wind pressure distribution is updated based on the fact that the fluctuating wind pressure coefficient linearly increases with the increase in the turbulence intensity,and the empirical formulae of the spectra and the coherences is updated based on conservative assumptions.Comparisons of the empirical results and full-scale measurement data suggest that the original empirical results are either too conservative or unsafe for use.However,economic efficiency and conservativeness will be balanced if the updated empirical results are employed for the wind engineering design.关键词
冷却塔/经验公式/风洞试验/现场实测/湍流强度Key words
cooling tower/empirical formula/wind tunnel test/full-scale measurement/turbulence intensity分类
建筑与水利引用本文复制引用
程霄翔..基于湍流强度效应的冷却塔表面风荷载经验公式修正[J].东南大学学报（英文版）,2021,37(4):413-420,8.基金项目
The National Natural Science Foundation of China(No.51908124),the China Postdoctoral Science Foundation (No.2016M601793). （No.51908124）
