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建立了动车组隧道交会三维数值模拟的计算模型。利用有限体积法求解三维、可压、非定常N—S方程和k—ε双方程湍流模型,通过动网格技术实现动车组的相对运动。建立了适用于气动性能分析的计算模型,模拟其隧道交会运行工况,对其进行外流场分析,得到了外流场的速度分布、压力分布等流场特性。
The calculation model of the three-dimensional numerical simulation of the tunnel crossing of the EMU is established. The three-dimensional, compressible and unsteady N-S equations and k-ε turbulence model are solved by the finite volume method, and the relative motions of the EMUs are realized by moving grid technology. A computational model suitable for aerodynamic performance analysis was established to simulate the operating conditions of the tunnel intersection. The flow field was analyzed and the flow field characteristics such as velocity distribution and pressure distribution were obtained.