南京工业大学学报（自然科学版）2024，Vol.46Issue(3)：321-329,354,10.DOI:10.3969/j.issn.1671-7627.2024.03.009
行车工况下竖井型城市公路隧道交通风动态演化规律
Dynamic evolution laws of traffic wind in urban road tunnels with shafts under driving conditions
摘要
Abstract
This study focused on urban road tunnels with shafts,measuring the interior and exterior ambient wind speeds.Considering variation in ambient wind speeds,shaft heights,and the number of shafts,a total of 24 cases were designed.Dynamic mesh and momentum source term techniques were employed to conduct numerical simulations of the tunnel's ventilation flow fields under driving conditions,obtaining its distribution when vehicles approached,passed by,and moved away from the shafts.The results indicated a stable longitudinal ambient wind of approximately 1 m/s both inside and outside the tunnels.Backflow phenomena were observed at the top and rear of vehicles,with a maximum backflow wind speed of about 2 m/s occurring at a height of 5-5.5 m.The uneven coefficient of velocity in a shaft cross-section and the conversion factor initially increased and then decreased with vehicle movement.The shaft ventilation efficiency was positively correlated with the number of shafts and reverse wind speed,reaching a maximum value of 100％.However,it decreased with increasing shaft height and forward wind speed,with a weak influence from street valley winds.关键词
隧道/竖井/活塞风/动网格/回流高度/通风效率Key words
tunnel/shaft/piston wind/dynamic mesh/backflow height/ventilation efficiency分类
交通工程引用本文复制引用
黄伟浩,童展鹏,熊道龙,周银清,童艳,柳泽林,陈锴铨..行车工况下竖井型城市公路隧道交通风动态演化规律[J].南京工业大学学报（自然科学版）,2024,46(3):321-329,354,10.基金项目
国家自然科学基金面上项目(52278112) （52278112）
江苏省研究生实践创新计划(SJCX22_0471) （SJCX22_0471）
