列车停靠隧道内救援站过程中活塞风变化的数值模拟分析

发布时间：2018-05-25 15:13

本文选题：活塞风 + 列车行驶状态　；参考：《中国铁道科学》2016年04期

【摘要】：采用流体动力学数值模拟软件FLUENT的动网格技术,建立列车驶向隧道内救援站的动网格模型,模拟和分析列车在驶向救援站的过程中(分别以匀速、减速和停车3种行驶状态运行时)处于不同位置的断面活塞风变化情况。结果表明:当列车匀速刚驶进隧道时,列车侧面环腔区域的活塞风方向与列车运行方向相反,之后,在列车匀速和减速状态下的活塞风方向与列车运行方向相同,但由于列车的行驶速度远大于活塞风的速度,因此当列车中后部发生火灾时所产生的烟气不会从列车尾部流向列车头部;当列车停靠在救援站中部时,救援站入口、出口及中部环腔区域内的活塞风由列车尾部流向列车头部方向,并在列车停车5min后活塞风的速度方能衰减到2.0m·s~(-1)以下;在列车停靠救援站的过程中,火灾烟气将流入疏散横通道。建议在进行救援站通风排烟设计时,重视列车停靠救援站初期的活塞风对列车火灾烟气流动的影响,以保证列车内人员安全疏散。
[Abstract]:Using the dynamic grid technology of the numerical simulation software FLUENT, the dynamic grid model of the train moving to the rescue station in the tunnel is established, and the simulation and analysis of the train moving towards the rescue station (at uniform speed, respectively) are carried out. The variation of cross-section piston wind in different position is in three running states of deceleration and stopping. The results show that the piston wind direction of the side ring cavity is opposite to that of the train when the train has just entered the tunnel, and the piston wind direction is the same as that of the train in the condition of uniform train speed and deceleration. But because the train travels much faster than the piston wind, the smoke generated when a fire breaks out at the back of the train does not flow from the rear to the head of the train; when the train stops in the middle of the rescue station, the rescue station entrance, The piston wind in the exit and central ring cavity region flows from the rear of the train to the head of the train, and the velocity of the piston wind can only decrease below 2.0 m / s ~ (-1) after the train stops 5min, and the smoke from fire will flow into the evacuation cross passage during the train stopping at the rescue station. It is suggested that attention should be paid to the effect of piston wind at the initial stage of train stop rescue station on the smoke flow of train fire in order to ensure the safe evacuation of train occupants in the design of ventilation and smoke exhaust in rescue station.
【作者单位】：西南交通大学土木工程学院;西南交通大学交通隧道工程教育部重点实验室;中铁大桥勘测设计院集团有限公司;
【基金】：国家自然科学基金资助项目(51278426)
【分类号】：U458;U298.6

【相似文献】