【摘要】 随着列车运行速度的不断提高,列车车体表面空气流场发生变化,从而改变了列车空调机组的运行工况,使得列车空调机组的性能受到影响.利用FLUENT软件对不同工况下高速列车外部流场进行数值模拟,得出高速列车表面气流压力场分布及其表面具体位置的压力值,进而分析了列车提速对空调机组冷凝风压、冷凝风量、冷凝温度及制冷系数等性能的影响.研究结果为高速列车空调机组的优化设计提供了一定的理论依据.更多还原

【Abstract】 With further improving the speed of high-speed train,the air flow on the train’s surface is altered.The operation condition of its air-conditioning unit is also changed,which at last,will affect the performance of the air-conditioning unit.The air flows on the surface of high-speed train in different conditions were simulated by using the software of FLUENT.The distribution of the air pressare on the surface of high-speed train and the pressure values at its specific locations were obtained.The effects of raising the train speed on its air-conditioning unit’s operation parameters,like the pressure of condenser fan,condensing air volume,condensing temperature and refrigeration coefficient were analysed.The conclusions provide certain theoretical basis for the optimization design of high-speed train’s air-conditioning.更多还原