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NUMERICAL 3D SIMULATION OF A LONGITUDINAL VENTILATION SYSTEM: MEMORIAL TUNNEL CASE

机译:纵向通风系统的3D模拟:记忆隧道案例

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In this work, a numerical 3D simulation of a longitudinal ventilation system is developed to analyze the fire behavior inside a road tunnel. Recent disasters, like crashes in the Mont Blanc tunnel (France, 1999) or San Gottardo (Italy, 2001), have shown the need for better integral actions during possible fire incidents. The minimum delay time, required for starting the jet fans, or the evolution of the smoke patterns inside the tunnel are critical issues when rescue plans are designed. Some methods to study the smoke propagation during a fire are: pseudo-thermal scale models, full scale test and numerical models. Several contributions using the first method can be found in references [1], [2] and [3]. However it is very difficult to extrapolate the results from this kind of models. The second method (full scale test) is the most expensive of all and only two of them have been conducted recently: EUREKA Project and the Memorial Tunnel Fire Ventilation Test Program. The last method (numerical models) it is now under development.rnThe objective of this work is to validate a numerical model, to predict the behavior of the smoke generated during a fire incident inside a road tunnel, comparing its results with previous experimental data collected in the Memorial Tunnel Project. In addition, a good agreement was achieved, so a methodology to predict the performance of a longitudinal ventilation system in case of fire was accurately established.
机译:在这项工作中,开发了纵向通风系统的3D数值模拟,以分析公路隧道内的火灾行为。最近发生的灾难,例如勃朗峰隧道(法国,1999年)或圣戈塔多(意大利,2001年)中的撞车事故,表明可能发生火灾时需要采取更好的整体行动。设计救援计划时,启动喷气风扇所需的最短延迟时间或隧道内烟雾模式的演变是关键问题。研究火灾过程中烟气传播的一些方法包括:伪热尺度模型,全尺度测试和数值模型。使用第一种方法的一些贡献可以在参考文献[1],[2]和[3]中找到。但是,很难从这种模型中推断出结果。第二种方法(全面测试)是所有方法中最昂贵的,并且最近仅进行了其中的两种:EUREKA项目和纪念隧道防火通风测试程序。现在正在开发最后一种方法(数值模型)。这项工作的目的是验证数值模型,预测公路隧道内火灾中产生的烟雾的行为,并将其结果与以前收集的实验数据进行比较。在纪念隧道项目中。此外,达成了良好的协议,因此准确建立了预测火灾时纵向通风系统性能的方法。

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