泄压井对高速铁路隧道出口微压波的影响研究

Study of the influence over shaft on high-speed railway tunnel exit micro-pressure wave

为了降低高速铁路隧道出口微压波对周围环境的影响,采用了三维粘性、可压缩、不等熵、非定常流的Navier-Stokes方程作为控制方程,空间离散采用了中心有限体积法格式,隧道壁和泄压井壁采用了壁面函数处理。针对高速列车突入带泄压井的隧道进行了数值模拟。计算结果表明,泄压井能有效降低高速铁路隧道出口微压波峰值,而且泄压井高度、隧道长度和列车速度对隧道出口的微压波峰值都有重要影响。

To decrease the influence of high - speed railway tunnel exit micro - pressure wave to surrounding environment, this paper used the Navier - Stokes equations described by three - dimensional unsteady viscous compressible non - homentropic flow as the control equations and, a cell - centered finite volume scheme for numerical integration of the Navier - Stokes equations was used for space discretization. In addition, the wails of the tunnel and shaft were described with wall functions to simulate the micro - pressure wave produced by a high - speed train entering a tunnel with a shaft. The calculated result shows that the shaft can sharply decrease the peak of the high - speed railway tunnel exit micro - pressure wave, and the height of the shaft the length of the tunnel the speed of the train play a significant effect on the peak of the micro - pressure wave.