| 引用本文: | 张建,李天,杨庆山.雷诺数对大跨屋盖结构表面风压的影响[J].哈尔滨工业大学学报,2016,48(6):38.DOI:10.11918/j.issn.0367-6234.2016.06.006 |
| ZHANG Jian,LI Tian,YANG Qingshan.Reynolds number effectson wind pressure distribution of large-span roof structure[J].Journal of Harbin Institute of Technology,2016,48(6):38.DOI:10.11918/j.issn.0367-6234.2016.06.006 |
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| 摘要: |
| 为研究不同雷诺数对大跨度屋盖结构表面风压分布特性的影响，采用大涡模拟计算流体动力学方法，计算二维屋盖表面平均和脉动风压系数；系统分析雷诺数对屋盖表面风压分布、流动分离及再附着现象的影响.数值计算结果表明：随着屋盖表面特征雷诺数的变化，屋盖表面风压分布亦发生明显变化，特征雷诺数较低时屋盖表面风压较平稳，特征雷诺数升高时屋盖前部的风压系数大幅增大，但增幅逐渐降低，最终趋于稳定.结果验证了雷诺数效应在屋盖结构风荷载模拟中的重要影响.
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| 关键词: 大跨屋盖结构 雷诺数效应 计算流体动力学 平均风压系数 脉动风压系数 |
| DOI：10.11918/j.issn.0367-6234.2016.06.006 |
| 分类号:TU312 |
| 文献标识码:A |
| 基金项目:国家自然科学基金 (51578059); 中央高校基本科研业务费(2015JBM074). |
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| Reynolds number effectson wind pressure distribution of large-span roof structure |
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ZHANG Jian1,2, LI Tian1,2,YANG Qingshan1,2
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(1.School of Civil Engineering, Beijing Jiaotong University,100044 Beijing, China;2.Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment, 100044 Beijing, China)
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| Abstract: |
| Reynolds numbers have great effects on the pressure distribution of large-span roof structure. To explore these issues, Large Eddy Simulation (LES) numerical method was adopted to calculate mean and fluctuation wind pressure distributions. The pressure values, flow separation and reattachment patterns were examined by corresponding experiment data. Results indicate that the pressure distribution changed dramatically with different Reynolds numbers. Pressure distribution keep srelatively stable in low Reynolds number flow field, while for high Reynolds number flow,pressure varies rapidly at the leading edge area of the roof and gradually decreases to a constant value. The simulation results prove that Reynolds numbers have critical effects on the pressure distribution of the large-span roof structures.
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| Key words: large-span roof structure Reynolds number effect computation fluid dynamics mean wind pressure coefficient fluctuation wind pressure coefficient |
