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摘要：地铁的通风系统对于每个乘坐地铁的人而言，都是十分重要的，一个安全舒适的地下环境都是不可或缺的。由于地铁的特殊性，每天乘坐地铁的人流量十分大，逃生难度较高，一旦发生火灾，将造成大量的人员伤亡，和经济财产的损失。所以在使用数值模拟的基础上对地下车站安全通风进行设计。35174
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本文使用gambit软件对地下车站进行建模，运用fluent软件对车站进行计算研究。如我们所知，不同城市，不同站点，不同线路的地下车站都是有差别的。而且地铁屏蔽门系统的造价较为昂贵，在全国只有少数城市是采用屏蔽门系统的。所以本文选择的地下车站较为简单，且为无屏蔽门的老式地下车站。地下车站在正常运营时，利用地铁隧道口的风速进行通风，一旦发生火灾，地铁站台的排烟口会进行排烟，且站台通往站厅的楼梯口有一个不小于1.5m/s的进口风速。本文主要考虑不同情况下的速度与温度的变化趋势，并选出最佳的方案。
CFD是近代流体力学，数值数学和计算机科学结合的产物，是一门具有强大生命力的边缘科学。所有的商用CFD软件均包括3个基本环节:前处理、求解和后处理。与之对应的程序模块简称为前处理器、求解器和后处理器。就目前来说，Fluent是国际上比较受欢迎的CFD软件包，在美国市场的占有率是60%。只要是跟流体、热传递及化学反应等有关的都可以使用。它含有丰富的物理模型、先进的数值方法和强大的前后处理功能，在各行各业的研究设计中都广泛的应用着。
本文利用数值模拟的方法研究某地下车站的安全通风情况。但是由于时间有限，本文只通过了Fluent的自身功能进行了一定的研究。但是这样受到了限制，存在一定误差，比如我们不能使用非稳态功能，无法来模拟时间与温度、速度的关系和变化。
此外，本文中我只从温度和速度两个方面进行了Fluent的数值计算。但Fluent的功能还有很多，可以从其他的方面使用Fluent来进行研究分析。
毕业论文关键词：地铁；通风；数值模拟；Fluent
The Safety Ventilation Design Of The Underground Station
Abstract: Subway ventilation system for each subway ride to the people is very important, a safe and comfortable underground environment is indispensable. Due to the particularity of the subway everyday take the subway traffic is very big, the escape of a higher degree of difficulty, in the event of a fire, it will cause a large number of casualties, property and economic losses. So the design of the underground station ventilation safety in using numerical simulation based on.
The modeling of the underground station using gambit software, the use of the station is calculated based on fluent software. As we know, different city, different sites, different lines of the underground station is a difference. But the subway shield door system cost is more expensive, in only a minority of the city is the screen door system. So this paper chooses the underground station is relatively simple, and without shield old underground station. Underground station in normal operation, the ventilation was carried out using the subway tunnel wind speed. In the event of fire, the subway station exhaust port will exhaust and platform leading to the station in the office of the staircase mouth has a not less than 1.5m/s inlet velocity. This paper considers the variation trend of the velocity and temperature under different conditions, and select the best scheme.
CFD is a modern fluid mechanics, numerical mathematics and computer science with the product is a strong vitality of frontier science. All the commercial CFD software includes 3 basic steps: pre-processing, solution and post-processing. The corresponding program modules referred to as preprocessor, solver and post processor. At present, Fluent is the international popular CFD software package, the market share is 60% America. As long as it is related to the fluid, heat transfer and chemical reaction can be used. It contains rich physical model, advanced numerical methods and the strong pre processing functions, in the research and design of all walks of life are widely used.