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首页> 外文期刊>Heat Transfer Research >A NEW SEMIEMPIRICAL MODEL FOR THE MAXIMUM TEMPERATURE UNDER THE CEILING IN URBAN TRAFFIC LINK TUNNEL FIRES
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A NEW SEMIEMPIRICAL MODEL FOR THE MAXIMUM TEMPERATURE UNDER THE CEILING IN URBAN TRAFFIC LINK TUNNEL FIRES

机译：城市交通隧道隧道顶棚下最高温度的一个新的半实模型

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摘要

The Urban Traffic Link Tunnel (UTLT) is an innovative underground transportation system for the modern metropolis, typically consisting of a main tunnel and several linked tunnels. To provide proper fire protection to the UTLT structure, the maximum temperature beneath the ceiling needs to be determined. However, as the effective height of the UTLT is lower than that of a normal tunnel, the maximum temperatures under the UTLT ceiling are different from those in normal tunnels. A theoretical analysis and CFD simulation were performed in this work to estimate the maximum temperature under the ceiling in UTLT. The smoke temperatures at 0.2 m under the ceiling of the UTLT were computed for different heat release rates, longitudinal ventilation velocities, and tunnel heights. Based on the simulation results, a new semiempirical model for the maximum temperature under the ceiling during UTLT fires has been developed. The comparison of the new model predictions with experimental data indicates that the model can predict experimental results fairly well and is suitable for the UTLT fire protection design.
机译：城市交通连接隧道（UTLT）是现代大都市的一种创新的地下交通系统，通常由一个主隧道和几个相连的隧道组成。为了给UTLT结构提供适当的防火保护，需要确定天花板以下的最高温度。但是，由于UTLT的有效高度低于正常隧道的高度，因此UTLT天花板下方的最高温度与正常隧道中的最高温度不同。在这项工作中进行了理论分析和CFD模拟，以估算UTLT天花板下的最高温度。针对不同的放热率，纵向通风速度和隧道高度，计算了UTLT天花板下0.2 m处的烟气温度。根据模拟结果，开发了一种新的半经验模型，用于UTLT火灾期间天花板下的最高温度。新模型预测与实验数据的比较表明，该模型可以很好地预测实验结果，适合于UTLT防火设计。

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