内燃动车组吊挂动力包通风性能及排烟口对空调进烟量影响  

Ventilation Performance and Influence of Smoke Vent on the Smoke Intake of Air Conditioners of Hanging Power Packs for DMUs

作　　者：许良中 陈春江 牛纪强 XU Liangzhong;CHEN Chunjiang;NIU Jiqiang(CRRC Zhuzhou Locomotive Co.,Ltd.,Zhuzhou Hunan 412001,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou Gansu 730070,China)

机构地区：[1]中车株洲电力机车有限公司,湖南株洲412001 [2]西南交通大学机械工程学院,四川成都610031 [3]兰州交通大学机电工程学院,甘肃兰州730070

出　　处：《中国铁道科学》2024年第4期133-146,共14页China Railway Science

基　　金：国家自然科学基金资助项目(52172359)。

摘　　要：针对内燃动力系统大功率、高集成化加剧散热,以及线路环境可能影响动力包通风性能和烟气扩散等问题,基于SST k-ω模型和定常/非定常可压缩雷诺平均方程,模拟动车组车体动力包周围和车顶排烟口下游空调周围的流场特性,分析车速和隧道对动力包风机通风性能以及排烟口对空调进烟量的影响。结果表明:风机流量受车速和位置的影响,同一动力包中上游风机流量稍大,而尾车则尤为明显,车速为160 km·h^(-1)时尾车上下游风机流量差异可达7%;空调新风口进烟量与车速正相关,尤其是紧靠排烟口空调的下游新风口进烟量;列车在进出隧道过程中其动力包格栅进风量出现脉冲式变化,两侧格栅进气量有所差异。The high power and high integration of internal combustion power system exacerbate the heat dissipation,and the line environment may affect the ventilation performance of the power pack and smoke diffusion problem.Based on the SST k-ωmodel and the constant/non-constant compressible Reynolds averaging equations,the flow field characteristics around the power pack of the train body and around the air conditioner downstream of the smoke vent on the roof were simulated to analyze the influence of the speed of the train and the tunnel on the ventilation performance of the power pack fan and the smoke vent on the smoke intake of the air conditioner.The results show that:the fan flow is affected by the speed and location of the car,the upstream fan flow in the same power pack is slightly larger,the tail car is especially obvious,and the difference between the upstream and downstream fan flow in the tail car can be up to 7%at the speed of 160 km·h^(-1);the smoke intake of air conditioning fresh air inlet is positively correlated with the speed of the car,especially the downstream fresh air inlet of air conditioning which is right next to the smoke exhaust;the air intake of the grill of the train’s power pack appears to have pulsed change during the process of entering and exiting the tunnel,with the difference in the grill intake of the two sides.

关 键 词：内燃动车组 吊挂动力包 通风性能 烟气扩散 明线工况 隧道工况 数值仿真 

分 类 号：U266.1[机械工程—车辆工程]