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-ω model 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
Key words
Diesel multiple unit/Hanging power packs/Ventilation performance/Smoke diffusion/Open-line condition/Tunneling condition/Numerical simulation
维普
万方数据