地铁活塞风作用下屏蔽门的气动特性分析-《郑州大学学报(工学版)》

文章信息/Info

Title:: Analysis of Aerodynamic Characteristics of Screen Door under The Action of Subway Piston Wind

Author(s):: YANG Weichao; PENG Limin; SHI Chenghua; etc; 1．Department of Civil Engineering，Central South University，Changsha 410075，China；2．Guangzhou Metro Design and Research Institute，Guangzhou 510010，China

摘要:: 根据三维不可压缩Navier-Stokes方程和标准κ-ε湍流方程,采用有限体积法模拟列车在区间隧道内运行过程,研究了屏蔽门的压力变化机理和压力时空变化特性,并分析了列车运行速度、阻塞比、活塞风井面积、风阀状态和区间隧道通风方案等诸多因素与屏蔽门压力之间的影响关系.结果表明:屏蔽门压力变化主要是由列车的有压科特湍流和区间隧道内压力波两方面因素决定,其中有压科特湍流是主要影响因素;屏蔽门压力与阻塞比和列车速度的平方呈正比;增加活塞风井面积、打开活塞风阀有利于降低屏蔽门压力.结构校核时需要考虑区间隧道排风模式对屏蔽门压力的影响.

Abstract:: According to the three-dimensional incompressible Navier-Stokes equation and the standard κ-ε turbulence equation, the finite volume method was used to simulate the operation process of the train in the interval tunnel, the pressure change mechanism and pressure spatiotemporal variation characteristics of the screen door were studied, and the influence relationship between the train running speed, blocking ratio, piston wind shaft area, damper state and interval tunnel ventilation scheme and the screen door pressure was analyzed. The results show that the pressure change of the screen door is mainly determined by the two factors of the pressurized Cort turbulence of the train and the pressure wave in the interval tunnel, among which the pressurized Cort turbulence is the main influencing factor. The screen door pressure is proportional to the blocking ratio and the square of the train speed; Increasing the area of the piston air well and opening the piston damper is conducive to reducing the pressure of the screen door. The influence of the exhaust mode of the interval tunnel on the pressure of the screen door should be considered during the structural check.