会车压力波对高速空调客车客室内流场的影响  

Effect of the Pressure Wave Caused by Two Vehicles Passing Each Other on the Flow Field inside Passenger Compartments of High Speed Air-Conditioned Passenger Cars

作　　者：陈琳[1] 李人宪[1] 刘杰[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《铁道车辆》2011年第8期7-10,1,共4页Rolling Stock

基　　金："十一五"国家科技支撑计划项目(2009BAG12A04-A10)

摘　　要：应用流体力学和传热学方程数值计算的方法,仿真分析了会车压力波对高速客车空调系统和客室内流场的影响,得到了客室内空气压力和CO2浓度随车外会车压力波变化的情况。计算结果表明,对于开放式列车空调系统,会车压力波会通过新风入口传递到客室内,使客室内的空气压力发生变化,其变化趋势与车外会车压力波的变化趋势一致;空调管路系统中大压头风机可有效抑制外界压力波,使客室内压力变化幅值大幅减小;外界压力的突然变化有可能导致客室内CO2浓度升高,且CO2浓度的变化略滞后于外界压力的变化。With the method of hydromechanics and digital calculation of heat transfer equation,the effect of the pressure wave caused by two vehicles passing each other on the air-conditioning system and flow field inside passenger compartments of high speed passenger cars is simulated and analyzed,it is obtained that air pressure and CO2 concentration inside passenger compartments will change along with the pressure wave caused by two vehicles passing each other.The calculation result shows that,for the open type air-conditioning system on the train,the pressure wave caused by two vehicles passing each other can transfer into the passenger compartment through the fresh air inlet,so that the air pressure inside compartments will change,and the changing trend will be the same as the changing trend of the pressure wave caused by two vehicles passing each other outside;The air fan with big pressure head in the air-conditioning pipeline system can inhibit the pressure wave outside effectively,so as to greatly reduce the pressure changing amplitude inside compartments.The sudden change of the outside pressure may cause the rise of CO2 concentration inside passenger compartments,and the change of CO2 concentration is slightly lag behind the change of outside pressure.

关 键 词：高速空调客车 压力波 计算流体力学 

分 类 号：U270.11[机械工程—车辆工程]