隧道内列车活塞风效应数值模拟分析

Numerical Simulation Analysis of the Effect of Piston Wind on Train in Tunnel

随着长及特长单线铁路隧道的大量修建,利用列车活塞风改善隧道内空气质量,降低隧道通风能耗已成为可能。采用数值模拟方法以英国Patchway隧道作为物理模型,利用Flunet17.0软件建立相应动网格模型。模拟计算获得的活塞风速平均值与实测值吻合度较好,表明该模拟方法准确性较高。在此基础上,改变行车速度,对隧道内列车活塞风效应做系列模拟计算。研究结果表明:以patchway隧道和列车数据为基本参数,列车行车速度每增加5m/s,平均活塞风速约以19.48%递增,平均增压约以50%左右递增,表明列车行车车速与活塞风速、风压存在正相关关系。该研究可为工程上列车活塞风效应估算提供借鉴。

With the extensive construction of long and long single-track railway tunnels,it has become possible to use piston winds to improve the air quality in tunnels and reduce the ventilation energy consumption of tunnels.This paper adopts the numerical simulation method to use the British patchway tunnel as the physical model,and uses Flunet17.0 software to establish the corresponding dynamic grid model.The simulation results show that the average value of the piston wind speed agrees well with the measured value,which indicates that the accuracy of the simulation method is higher.Based on this,change the speed of the train and do a series of simulation calculations on the effects of the piston wind on the tunnel.The research results show that with patchway tunnel and train data as the basic parameters,the average speed of the piston increases by approximately 19.48%for every 5 m/s of the speed of the train,and the average boost increases by approximately 50%,indicating that the train speed and the piston wind speed There is a positive correlation between wind pressure and wind pressure.The research in this paper can provide reference for estimating the piston wind effect of trains in engineering.