中国计量大学学报2024，Vol.35Issue(2)：197-202,221,7.DOI:10.3969/j.issn.2096-2835.2024.02.002
隧道分岔形式对分流局部通风阻力特性的影响
Influence of tunnel bifurcation form on the local ventilation resistance characteristics of dividing flow
摘要
Abstract
Aims:With the improvement of urban construction level and intensity,there are more and more bifurcated tunnels with ramps.In response to the difficulty of ventilation design in bifurcated tunnels,it is urgent to explore the influence of tunnel bifurcation form on the local ventilation resistance characteristics of dividing flow.Methods:By building a 1/13 scale bifurcated tunnel ventilation test platform that synchronously met the similarity of resistance and pressure and a three-dimensional CFD model of bifurcated tunnel,the flow characteristics and local loss coefficient of different bifurcated forms of bifurcated tunnels were studied.And the influence of the tunnel bifurcated forms such as the diversion structure and the deceleration lane on the local loss coefficient was further analyzed.Results:The results showed that the local loss coefficient of the main line and ramp decreased first and then increased with the increase of the diversion ratio,and reached the minimum when the diversion ratio was 0.4.Compared with directional bifurcated tunnels,there was little difference in the local loss coefficient of the main line,but there was an obvious difference in the local loss coefficient of the ramp.When the diversion ratio was small,the local loss of the ramp of the parallel bifurcated tunnel was greater.And when the diversion ratio was large,it was the opposite.The addition of the deceleration lane would reduce the local loss coefficient of the ramp when the diversion ratio was small,but would increase the local loss coefficient of the main line when the diversion ratio was large.Conclusions:The research results can provide reference for the ventilation design of bifurcated tunnels.关键词
局部阻力/隧道工程/分流/计算流体动力学模拟/缩尺试验/平行匝道Key words
local loss/tunnel engineering/bifurcation/computational fluid dynamics simulations/scale test/parallel ramp分类
交通工程引用本文复制引用
朱凯,胡会平,张欣,杨文静,吴珂..隧道分岔形式对分流局部通风阻力特性的影响[J].中国计量大学学报,2024,35(2):197-202,221,7.基金项目
陕西省自然科学基础研究计划项目(No.2023-JC-YB-378),浙江省建设科研项目(No.2020K121),宁波市交通运输科技计划项目(No.202113) （No.2023-JC-YB-378）
