隧道断面形状对通风摩擦阻力损失的影响  

Influence of Tunnel Section Shape on Friction Loss

作　　者：王亚琼[1] 辛韫潇 武义凯 王金宝 

机构地区：[1]长安大学陕西省公路桥梁与隧道重点实验室,西安710061 [2]陕西省西安市户县交通运输局,西安710300 [3]云南省高速公路联网管理中心,昆明650228

出　　处：《西安工业大学学报》2015年第8期617-622,共6页Journal of Xi’an Technological University

基　　金：陕西自然科学基金(2014JM7245);中央高校基本科研业务费创新团队项目(310821153312)

摘　　要：通风阻力是影响隧道通风的重要因素,为研究隧道不同断面形状对隧道通风沿程阻力系数的影响,采用流体力学Fluent软件,对半圆拱形、三心圆拱形、直墙式以及矩形等不同断面形状的隧道进行模拟,对比分析了不同风速下摩擦阻力系数的变化规律.研究结果表明:隧道断面形式相同时,壁面的摩阻损失系数值随着风速的增加而减小;风速相同时,随着断面面积的增加,壁面的摩阻损失系数值逐渐减小.The ventilation resistance is an important adverse effect of tunnel ventilation.The influence of different section shape of tunnel on the drag coefficient of tunnel ventilation is studied.This article aims to different section shapes of tunnel by the numerical simulation analysis on ventilation resistance, in order to find the scale of its influence to the friction loss.The semi-circular arch,three common hearts round arch,vertical wall and rectangular cross section tunnels are analyzed separately,by the CFD software Fluent,to compare the changeable law of friction loss with different wind speed,and draw the corresponding conclusion.The results show that the friction loss coefficient decreases with the increase of wind speed in the same section shape,and it decreases with the increase of section area in the same wind speed.

关 键 词：隧道通风 摩阻损失 断面形状 数值模拟 

分 类 号：U453.5[建筑科学—桥梁与隧道工程]