动车组车内行李架火灾数值模拟

Research on Numerical Simulation of Fire on Luggage Rack in EMU

建立了模拟动车组车内火灾的计算流体动力学模型,基于低马赫数三维非稳态Navier-Stokes控制方程,使用大涡(LES———Large Eddy Simulation)湍流模型计算火驱动的空气流动,对动车组行李架上小型火灾进行了数值仿真研究,分析了动车组行李架上小型火灾时车内烟气、温度及速度分布特点.结果表明:行李架上小型火灾事故时,烟雾仅在车顶部空间蔓延,只有顶部空间温度升高较为明显,既车顶部火源较小的小型火灾可以导致较高的局部高温.

An aerodynamics model is set up for the simulation on fire disaster in a EMU car, the LES turbulenc model is used as a simulation method based on 3D unsteady Navier-Stokes equation, a fire accident simulation with a small fire source in luggage rack is performed, and the smoke spread and the tremeture distribution are achieved. The simulation results show that the smoke only exists in the top space, and the temperature increase in the top space is greater in case of a top space fire source,which even is small,but a local high temperature may be produced.