横风条件下高速列车车下设备舱温度场分析
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摘要
高速列车运行过程中,设备舱内发热设备工作,产生大量的热量.对某型号高速列车车下设备舱长期温度跟踪监测数据进行分析,选取合适试验数据为边界条件,基于三维非定常不可压缩N-S方程和k-ε两方程湍流模型,在横风环境中不同环境温度下用FLUENT对时速350 km/h的高速列车进行车下设备舱温度场仿真.通过对比试验数据和仿真结果,获得置信度较高的数值仿真模型.结果表明:横风来流侧通风格栅位于一位端时通风散热效果更好;在发热设备附近增加通风格栅数量和对称布置通风格栅更有利于车下设备舱通风散热;获得横风条件下车下设备舱温度分布规律,为车下设备的合理布局提供参考.
The heating equipment in the off vehicle equipment cabin generates a great deal of heat during the operation of the high speed train. The long term temperature monitoring data of a high speed train equipment cabin was analyzed,and the appropriate experiment data was chosen as the boundary conditions. Based on three-dimensional unsteady incompressible N-S equation and k-ε two equation turbulence model,the temperature of the equipment cabin in 350 km/h was simulated by FLUENT software at different ambient temperatures in the cross wind environment. An accurate numerical simulation model is obtained by comparing the experimental data and the simulation results. The result shows that at the wind flow side,the ventilation and heat dissipation is better when ventilation grille is positioned at"B"end of the car. In the vicinity of the heating equipment,increasing the number of ventilation grille and symmetrical layout of the ventilation grille is more conducive to the heat dissipation. The temperature distribution law of the equipment cabin under the condition of cross wind is obtained,which provides a reference for the reasonable layout of the equipment under the high speed train.
The heating equipment in the off vehicle equipment cabin generates a great deal of heat during the operation of the high speed train. The long term temperature monitoring data of a high speed train equipment cabin was analyzed,and the appropriate experiment data was chosen as the boundary conditions. Based on three-dimensional unsteady incompressible N-S equation and k-ε two equation turbulence model,the temperature of the equipment cabin in 350 km/h was simulated by FLUENT software at different ambient temperatures in the cross wind environment. An accurate numerical simulation model is obtained by comparing the experimental data and the simulation results. The result shows that at the wind flow side,the ventilation and heat dissipation is better when ventilation grille is positioned at"B"end of the car. In the vicinity of the heating equipment,increasing the number of ventilation grille and symmetrical layout of the ventilation grille is more conducive to the heat dissipation. The temperature distribution law of the equipment cabin under the condition of cross wind is obtained,which provides a reference for the reasonable layout of the equipment under the high speed train.
引文
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[2]黄少东,范乐天,李福禄,等. CRH3型动车组设备舱温度分布和变化规律[J].大连交通大学学报,2013,34(5):54-57.
[3]张垒.高寒车设备舱温度场特性研究[D].大连:大连交通大学,2013.
[4]李丽,张垒,张泽云,等.高寒车设备舱散热性能数值分析[J].大连交通大学学报,2014,35(3):14-17.
[5]潘登,臧建彬,高乃平.高速列车设备舱温度场数值计算:上海市制冷学会2013年学术年会论文集[C].上海:上海市制冷学会,2013.
[6]胡文锦,孔繁冰,张继业,等.高速列车设备舱通风散热数值模拟[J].计算机辅助工程,2013,22(5):1-6.
[7]王一丰.高速列车车下设备舱温度场测试及仿真分析研究[D].大连:大连交通大学,2015.
[8]张亮,孔繁冰,张继业,等.格栅对高速列车设备舱散热性能的影响[J].计算机辅助工程,2015,24(2):22-28+35.
[9]白刚.高速列车设备舱通风散热影响因素分析[J].发电与空调,2016,37(4):86-90.
[10]SUZUKI M,TANEMOTO K,MAEDA T. Aerodynamic characteristics of train/vehicles under cross winds[J].Journal of Wind Engineering&Industrial Aerodynamics,2003,91(1):209-218.
[11]袁侠义,谷正气,杨易,等.汽车发动机舱散热的数值仿真分析[J].汽车工程,2009,31(9):843-847,853.