长大隧洞施工通风三维数值模拟及优化设计

发布时间：2018-04-13 16:46

  本文选题：通风散烟 + 三维数值模拟　； 参考：《人民黄河》2017年06期

【摘要】：通风散烟是水利水电工程长大隧洞施工中的重要环节。传统的施工通风设计没有考虑污染物的排放过程等,负压风机的设计多依赖经验,常出现施工通风效果不佳的问题。采用计算流体力学软件FLUENT进行长大隧道通风散烟三维数值模拟,研究不同负压风机风量对独头掘进的长大隧洞施工有害气体排放特性的影响,提出了隧洞负压风机实际工作流量与正压风机实际工作流量比值为1.1~1.3时,对隧洞内有害气体排出最有利。同时,结合隧洞掘进过程中风机实际工作状态,从保证隧洞在掘进到不同长度时都有较好通风条件的角度,提出了以掘进长度1 km时负压与正压风机实际工作流量比为1.1为控制的长大隧洞负压风机风量设计方法。
[Abstract]:Ventilating and dispersing gas is an important link in the construction of long tunnel of water conservancy and hydropower project.The traditional construction ventilation design does not consider the pollutant discharge process, the negative pressure fan design depends on the experience, often has the construction ventilation effect not to be good the question.Using the computational fluid dynamics software FLUENT to simulate the ventilation and smoke emission of long and long tunnel, the influence of different negative pressure fan air volume on the harmful gas emission characteristics in the construction of long tunnel with single head tunneling is studied.When the ratio of actual working flow of negative pressure fan and actual working flow of positive pressure fan is 1.1 ~ 1.3, it is most favorable for the discharge of harmful gas in tunnel.At the same time, considering the actual working condition of the fan in the tunneling process, from the point of view of ensuring that the tunnel has better ventilation conditions during tunneling to different lengths,A design method of air volume of negative pressure fan in long tunnel is presented, which is controlled by the actual working flow ratio of negative pressure fan to positive pressure fan at 1 km driving length.
【作者单位】： 四川大学水利水电学院;
【分类号】：TV554
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本文编号：1745353