| UTLT烟气回流与限制速度的模型 |
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| 引用本文： | 李思成,王伟,赵耀华.UTLT烟气回流与限制速度的模型[J].北京工业大学学报,2016,42(6):893-901. |
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| 作者姓名： | 李思成 王伟 赵耀华 |
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| 作者单位： | 北京工业大学建筑工程学院，北京 100124;中国人民武装警察部队学院消防指挥系，河北 廊坊 065000;北京工业大学建筑工程学院,北京,100124 |
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| 基金项目： | 国家自然科学基金资助项目(51178015) |
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| 摘 要： | 为了解决城市地下交通联系隧道( urban traffic link tunnel,UTLT)火灾烟气安全的问题,采用量纲分析方法推导出了UTLT火灾烟气回流长度的量纲一方程式；根据调查的UTLT的常见尺寸,设置了9种不同尺寸的UTLT,运用数值模拟软件FDS 5.5对这些隧道进行模拟计算,得到了不同工况下的火灾烟气回流长度,进而得到了UTLT火灾烟气回流长度的预测模型.通过与实验值的比较表明,该方程式和实验值吻合较好.在进一步分析的基础上,得到了UTLT的限制隧道预测模型,可为此类隧道的消防设计提供一定的技术指导.
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| 关 键 词： | UTLT 烟气回流 限制速度 量纲分析法 |
Model of Back-layering and Confinement Velocity in UTLT Tunnel |
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| LI Sicheng,WANG Wei,ZHAO Yaohua.Model of Back-layering and Confinement Velocity in UTLT Tunnel[J].Journal of Beijing Polytechnic University,2016,42(6):893-901. |
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| Authors: | LI Sicheng WANG Wei ZHAO Yaohua |
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| Abstract: | Urban Traffic Link Tunnel( UTLT) is a new-type underground traffic system and smoke control is important to ensure fire safety in tunnels. A dimensionless equation of back-layering in UTLT tunnel with scaling analysis method was derived. According to usual sizes of UTLT, tunnels of different sizes were set and then fire was simulated with CFD software FDS 5. 5 . The length of back-layering was obtained at different conditions. At last a model of back-layering in UTLT was obtained. The model agreed well with full scale and medium scale experimental data. The model of confinement velocity was derived on the basis of back-layering model. The research can provide technical reference for UTLT fire protection design. |
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| Keywords: | urban traffic link tunnel(UTLT) back-layering confinement velocity scaling analysis method |
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