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(1 山東電力工程咨詢(xún)?cè)河邢薰荆?濟(jì)南 250013； 2 南京航空航天大學(xué)土木工程系， 南京 210016)

［摘要］為研究大型間冷塔展寬平臺(tái)及百葉窗內(nèi)外壓取值，以國(guó)內(nèi)某擬建的210m高超大型雙曲線型間冷塔為研究對(duì)象，采用剛體測(cè)壓風(fēng)洞試驗(yàn)對(duì)間冷塔內(nèi)外表面風(fēng)荷載進(jìn)行了研究，并考慮了不同透風(fēng)率對(duì)展寬平臺(tái)及百葉窗內(nèi)外壓的影響?；陲L(fēng)洞試驗(yàn)結(jié)果，歸納總結(jié)了展寬平臺(tái)及百葉窗內(nèi)外表面風(fēng)壓分布規(guī)律，對(duì)比分析了不同透風(fēng)率和風(fēng)速對(duì)展寬平臺(tái)及百葉窗內(nèi)表面平均風(fēng)壓系數(shù)的影響，同時(shí)給出了不同風(fēng)壓模擬標(biāo)準(zhǔn)下展寬平臺(tái)及百葉窗負(fù)壓極值取值建議和風(fēng)壓擬合公式。結(jié)果表明，展寬平臺(tái)及百葉窗外壓分布明顯與塔筒分布不同，在背風(fēng)區(qū)存在一定的負(fù)壓增強(qiáng)區(qū)，內(nèi)壓絕對(duì)值隨著透風(fēng)率的增大而減小。

［關(guān)鍵詞］大型間冷塔； 風(fēng)洞試驗(yàn)； 風(fēng)荷載； 展寬平臺(tái)； 百葉窗

中圖分類(lèi)號(hào)：TU398-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)05-0131-05

Study on  internal and external pressure values of extended platform and window shades of large indirect dry cooling tower

Zhang Yongfei1， Ke Shitang2， Chen Dewen1， Sun Wen1

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

Abstract:In order to study the value of the internal and external pressure of extended platform and window shades of large indirect dry cooling tower, a 210 m high and super-large hyperbolic indirect dry cooling tower was taken as the research object, and the wind load on the internal and external surface of the indirect dry cooling tower was studied by means of a rigid-body pressure-measuring wind tunnel test, and the influence of different air permeability on the internal and external pressure of the extended platform and window shades were considered. Based on wind tunnel test results, the wind pressure distribution law of the internal and external surfaces of extended platform and window shades were summarized. The influences of different ventilation rates and wind speeds on the average wind pressure coefficient of the internal surface of the extended platform and window shades were compared and analyzed. Suggestions on the extreme value of the negative pressure and wind pressure fitting formulas of the extended platform and window shades under different wind pressure simulation standards were given. The results show that the distribution of the external pressure of the extended platform and window shades is obviously different from that of the tower tube. There is a certain negative pressure enhancement area in the leeward area, and the absolute value of the internal pressure decreases with the increase of the ventilation rate. 

Keywords:large indirect dry cooling tower; wind tunnel test; wind load; extended platform; window shade