摘要
隧道上下游洞口间距较短时,从上游排出的污染空气来不及完全扩散便又被吸入下游隧道,造成二次污染,这种现象被称作污染物窜流,会降低通风效率增大运营成本。此前研究主要针对纵向窜流和横向窜流单独发生的情况,并且普遍将山体简化为垂直平面。本研究采用CFD数值模拟方法建立连续隧道群模型,对不同山壁倾角下的污染物窜流情况进行模拟分析。结果表明连续隧道群洞口间污染物窜流存在一种不同于纵向窜流和横向窜流的形式,并且增大山壁倾角能明显减少窜流量,当山壁倾角从0°增大到60°,窜流比从79.2%下降到67.7%。
When the distance between the upstream and downstream openings of the tunnel is short,the polluted air discharged from the upstream is sucked into downstream tunnel before it spread completely causing secondary pollution.This phenomenon is called pollutant interporosity flow,and reduces ventilation efficiency and increases operating costs.Previous researches individually focused on vertical interporosity flow and horizontal interporosity flow with simplifying the mountain to a vertical plane.CFD numerical simulation is adopted to build the model of continuous tunnels group,and interporosity flow situation with different mountain surface inclinations are analyzed.Results show there is a interporosity flow form different from vertical and horizontal interporosity flow when interporosity flow occurs in continuous tunnels group.And interporosity flow is obviously decreased from 79.22% to 67.71% with the mountain surface inclination increasing from 0° to 60°.
作者
唐莎
韩晓阳
曾仕豪
袁中原
雷波
Tang Sha;Han Xiaoyang;Zeng Shihao;Yuan Zhongyuan;Lei Bo(CCCC Highway Consultants Co.,Ltd,Beijing,100120;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031)
出处
《制冷与空调（四川）》
2021年第6期815-818,847,共5页
Refrigeration and Air Conditioning
关键词
污染物窜流
连续隧道群
山壁倾角
数值模拟
large space buildings
warm air heating
coupled airflow
numerical simulation
