地铁车站环控系统设计中气流组织方案的数值模拟

Numerical Simulation of Air Distribution of Different Ventilation Strategy Designed for Environment Control of Metro Station

针对地铁车站环境控制系统设计中常用的几种典型气流组织方案,使用计算流体力学(CFD)的方法,采用重正化群双方程紊流模型,对待建地铁车站及其隧道内的温度场和气流速度场进行三维数值模拟,得到各种方案下的温度和气流速度分布。通过分析和比较,认为屏蔽门方案能够得到最优的站台候车环境,但会使隧道内的温度有较大的升高,且投资较大;在投资较小的3种方案中,混合回/排风方案的效果最佳,对该方案造成的站台上气流速度分布不均匀的情况提出了相应的改善措施,并对数值模拟方法在地铁车站环控系统设计中的应用进行了探讨。

Several typical ventilation strategies are simulated in three dimensional by numerical method of computational fluid dynamics （CFD） with Renormalization Group turbulence model. Temperature and velocity distribution in platform and tunnel of each strategy is achieved. It is shown that Platform Screen Door （PSD） is the best scheme from the comfort point of view. But the increasing of cooling load in tunnel and the investment of PSD system is considerable. UPE/OTE return ventilation scheme performs better than other three schemes. The application of numerical simulation method in design of environment control system of metro station was evaluated.