双车道公路隧道射流风机布置方式研究  

Layout of Jet Fans Used in Double-Lane Highway Tunnels

作　　者：范建国[1] 方勇[1] 雷帅[1] 黄磊[1] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,成都610031

出　　处：《现代隧道技术》2017年第2期149-155,共7页Modern Tunnelling Technology

摘　　要：射流风机的升压效果不仅与风机本身的性能有关,还与风机纵、横断面的设计位置等外部条件有关。双车道公路隧道横断面空间有限,合理设置风机位置对风机效率的提高有重大意义。文章运用大型通用CFD软件对隧道中射流风机的射流场进行模拟,结果表明:为了降低两股射流的相互干扰以及隧道壁面对射流的影响,两台风机的净距应当为1D^2D,最佳净距为1.5D;为了降低隧道内壁对射流的干扰,风机的高度应尽量接近建筑限界,风机距离隧道拱顶的距离为1.2D;隧道纵向上为避免两组风机互相干扰的同时又达到最佳升压效果,纵向距离L应在100~120 m之间,最佳纵向距离应为110 m。Pressure boosting is not only related to the performance of jet fans, but also to their designed locations in longitudinal and transverse sections. Due to the limited space of the double-lane highway tunnel transverse section, it is important to have a reasonable layout of fans to improve their efficiency. Universal CFD software was used to simulate the flow field of jet fans in double-lane highway tunnels. Results show that： the clear distance of two jet fans should be 1D - 2D, and the best clear distance is 1.SD to reduce the mutual interference of two jet flows and the impact of the tunnel wall on the jet flow; the height of the fan should be close to the building clearance as far as possible, and the distance between the jet fan and the tunnel vault should be 1.2D to decrease the interference of the tunnel＇s inner wall on the jet flow; and the longitudinal distance L should be between 100 m and 120 m, with the best longitudinal distance at 110 m in order to avoid mutual interference of two group of fans and achieve the best ef- fect on pressure boosting.

关 键 词：公路隧道 射流风机 安装间距 

分 类 号：U453.5[建筑科学—桥梁与隧道工程]