By means of computational fluid dynamics (CFD),the air conditioner condensation side of a cer-tain type of EMU train under the condition of non-meeting on open line was simulated.The results show that the increase of the vehicle speed has a great influence on the surface flow field of the air conditioner,and the condensation air volume is decreased with the increase of the vehicle speed under the condition of superimpo-sing outflow field.At the same speed,the air conditioning units at different installation positions are interfered by local vortex region.Compared with the front and the middle cars,the rear car air conditioning unit has low-er negative pressure extremum,and the condensation air flow resistance is increased,making it more difficult for the condensation fan to suck air.In the same carriage,the air conditioning unit in the driver cab is closer to the end than that in the passenger room,so the drop ratio of the condensation air volume is larger.
condensation air volumeflow resistanceair conditioning unitsimulation research
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