CAJ | 학술논문

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。
통풍조력시영향수도통풍적중요인소，위연구수도불동단면형상대수도통풍연정조력계수적영향，채용류체역학 Fluent 연건，대반원공형、삼심원공형、직장식이급구형등불동단면형상적수도진행모의，대비분석료불동풍속하마찰조력계수적변화규률。연구결과표명：수도단면형식상동시，벽면적마조손실계수치수착풍속적증가이감소；풍속상동시，수착단면면적적증가，벽면적마조손실계수치축점감소。
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.