大型间冷塔展宽平台及百叶窗内外压取值研究

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英文篇名：Study on internal and external pressure values of extended platform and window shades of large indirect dry cooling tower 作者：张永飞 ; 柯世堂 ; 陈德文 ; 孙文 英文作者：Zhang Yongfei;Ke Shitang;Chen Dewen;Sun Wen;Shandong Electric Power Engineering Consulting Institute Co., Ltd.;Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics; 关键词：大型间冷塔 ; 风洞试验 ; 风荷载 ; 展宽平台 ; 百叶窗 英文关键词：large indirect dry cooling tower;;wind tunnel test;;wind load;;extended platform;;window shade 中文刊名：JCJG 英文刊名：Building Structure 机构：山东电力工程咨询院有限公司;南京航空航天大学土木工程系; 出版日期：2019-03-10 出版单位：建筑结构 年：2019 期：v.49;No.497 基金：江苏省优秀青年基金项目(BK20160083);; 国家自然科学基金(51208254) 语种：中文; 页：JCJG201905020 页数：6 CN：05 ISSN：11-2833/TU 分类号：69+136-140

摘要

为研究大型间冷塔展宽平台及百叶窗内外压取值,以国内某拟建的210m高超大型双曲线型间冷塔为研究对象,采用刚体测压风洞试验对间冷塔内外表面风荷载进行了研究,并考虑了不同透风率对展宽平台及百叶窗内外压的影响。基于风洞试验结果,归纳总结了展宽平台及百叶窗内外表面风压分布规律,对比分析了不同透风率和风速对展宽平台及百叶窗内表面平均风压系数的影响,同时给出了不同风压模拟标准下展宽平台及百叶窗负压极值取值建议和风压拟合公式。结果表明,展宽平台及百叶窗外压分布明显与塔筒分布不同,在背风区存在一定的负压增强区,内压绝对值随着透风率的增大而减小。
        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.

引文

[1] 柯世堂,侯宪安,姚友成,等. 大型冷却塔结构抗风研究综述与展望[J]. 特种结构,2012,29(6):5-10.
    [2] 王浩,柯世堂. 三种典型子午线型大型冷却塔风致响应分析[J]. 力学与实践, 2015, 37(6): 690-697.
    [3] 工业循环水冷却设计规范:GB/T 50102—2014 [S].北京: 中国计划出版社, 2014.
    [4] 火力发电厂水工设计规范:DL/T 5339—2006 [S].北京: 中国电力出版社, 2006.
    [5] VGB-Guideline:Structural design of cooling tower-technical guideline for the structural design, computation and execution of cooling tower:VGB-R610Ue[S]. Essen: BTR Bautechnik Bei Kühltürmen,2005.
    [6] GOUDARZI M, SABBAGH YAZDI S R. Effect of turbulent modeling on computed wind pressure load over cooling towers with base structures and comparison with VGB Guide-line [J]. Civil Engineering Infrastructures Journal, 2010, 44(2):225-236.
    [7] KE S T, LIANG J, ZHAO L, et al. Influence of ventilation rate on the aerodynamic interference between two extra-large indirect dry cooling towers by CFD[J]. Wind and Structures-An International Journal, 2015, 20(3): 449-468.
    [8] 李鹏飞,赵林,葛耀君,等. 超大型冷却塔风荷载特性风洞试验研究[J]. 工程力学,2008,25(6):60-67.
    [9] 邹云峰,何旭辉,陈政清,等. 超大型冷却塔内表面风荷载风洞试验与数值模拟研究[J]. 空气动力学学报, 2015,33(5):697-705.
    [10] 邹云峰,何旭辉,谭立新,等. 特大型冷却塔单塔内表面风荷载三维效应及其设计取值[J]. 湖南大学学报(自然科学版), 2015,42(7):24-30.
    [11] PIRNER M. Wind pressure fluctuations on a cooling tower[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1982,10(3): 343-360.
    [12] 董国朝,陈政清,罗建辉,等. 冷却塔混凝土粗糙度对平均风压系数的影响[J]. 湖南大学学报(自然科学版),2011,38(7): 6-12.
    [13] 柯世堂,赵林,葛耀君. 大型双曲冷却塔表面脉动风压随机特性——风压极值探讨[J]. 试验流体力学,2010,24(4):7-12.
    [14] 邹云峰,何旭辉,王汉封,等. 表面粗糙度对双曲冷却塔风压分布的影响[J]. 湖南大学学报(自然科学版), 2015,42(7):16-24.
    [15] 沈国辉,王宁博,孙炳楠,等. 大型双曲冷却塔的自振特性[J]. 重庆大学学报(自然科学版),2012,35(2):47-54.