[1] Cheng Xiaoxiang,. Updating empirical results of wind loads on cooling towersfor turbulence intensity effects [J]. Journal of Southeast University (English Edition), 2021, 37 (4): 413-420. [doi:10.3969/j.issn.1003-7985.2021.04.011]

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Updating empirical results of wind loads on cooling towersfor turbulence intensity effects()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

37

Issue:

2021 4

Page:

413-420

Research Field:

Civil Engineering

Publishing date:

2021-12-20

Info

Title:

Updating empirical results of wind loads on cooling towersfor turbulence intensity effects

Author(s):

Cheng Xiaoxiang

School of Civil Engineering, Southeast University, Nanjing 211189, China

Keywords:

cooling tower;  empirical formula;  wind tunnel test;  full-scale measurement;  turbulence intensity

PACS:

TU317.1;TU271.1

DOI:

10.3969/j.issn.1003-7985.2021.04.011

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.

References:

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Memo

Memo:

Biography: Cheng Xiaoxiang(1985—), male, doctor, associate research fellow, cxx_njut@hotmail.com.
Foundation items: The National Natural Science Foundation of China(No. 51908124), the China Postdoctoral Science Foundation(No. 2016M601793).
Citation: Cheng Xiaoxiang. Updating empirical results of wind loads on cooling towers for turbulence intensity effects[J].Journal of Southeast University(English Edition), 2021, 37(4):413-420.DOI:10.3969/j.issn.1003-7985.2021.04.011.

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