高寒车设备舱散热性能数值分析

Aerodynamics Numerical Simulation of Heat Dissipation for High-Cold ENU Equipment Compartment

基于不可压缩流体N-S控制方程和RNG k-ε湍流模型,建立了包含设备舱的五车编组高寒车流场三维计算模型.对350 km/h明线运行高寒车外流场与设备舱内流场耦合的空气动力学特性进行了数值仿真,得出高寒车设备舱内各设备表面温度分布及设备附近区域的流动情况；将数值仿真数据与实验数据进行对比,数值分析结果与实验数据吻合较好,误差控制在6.76%以内,验证了数值分析的准确性.计算表明：牵引变压器的表面温度大约在34.05～45.55℃之间,前表面和右侧表面温度较高,上表面和其它面温度较低.单倍辅助变流器的温度大约在30.33～32.82℃之间,其前表面和右侧表面温度较高,其余表面温度相对较低.

Based on uncompressible N-S equation and turbulent model of RNG k-ε two equations,a 3-D aerodynamics model of a high-cold ENU including 5 carriages with equipment compartment is built,and the coupling of aerodynamics characters between the outer flow fields of the model and the internal flow fields of equipment compartment are simulated when the ENU running at 350 km / h on openlines. The detailed information on the temperature field of the internal surface of equipment compartments is acquired,together with the flow field around the equipment compartments. The results are proved in good agreement with the experimental data,and error is controlled within 6. 76%. The temperature of the traction transformer is at about 34. 05 ～ 45. 55℃,and the haplotype auxiliary converter is at about 30. 33 ～ 32. 82℃. Both of them have the same regularity of temperature distribution,and the temperature of the front surface and the right surface is higher than any other surfaces.