文档介绍：动车组明线会车工况下的设备舱气流组织仿真研究
[韩运动陈大伟]
[南车青岛四方机车车辆股份有限公司国家高速动车组总成工程技术研究中心,266111]
[ 摘要] 对动车组在明线会车工况下的设备舱内气流组织进行了仿真分析,计算采用了将明线会车的外
流场与设备舱的内流场分开计算的方法。本文进行了 300km/h、400km/h 两种交会速度工况
的计算。首先运用 ANSYS-FLUENT 的动网格方法对明线会车设备舱的外流场进行计算,获
得了会车历程中各关键时间点下的设备舱各进、排风口处的瞬态压力值,然后将获得的压力值
作为设备舱内流场计算的压力边界条件,以此计算出设备舱在不同会车时间点下的各进、排风
口的流量值,进而来探寻明线会车工况下设备舱内的各进排风口流量的演变规律。
[ 关键词] 动车组明线会车设备舱气流组织
The air distribution simulation study of EMU equipment
bay passing by each other on open track
[Han YunDong Chen Dawei]
[CSR QINGDAO SIFANG CO.,LTD The national high speed train assembly engineering
technology research center, 266111]
[ Abstract ] The air distribution of EMU equipment bay was simulated and analyzed under the condition
of passing by each other on open track. The outer flow field and equipment bay inner flow
field were calculated separately. This article has carried on the 300km/h and 400km/h
intersection speed calculation. First of all, the dynamic mesh method of ANSYS-FLUENT
was used for equipment bay under the condition of passing each other on open track. The
transient pressure values of the inlets and outlets of the equipment bay were got under
different passing time. The transient pressure values were calculation as the equipment bay
inner flow field boundary condition. Finally, the flow value of the equipment bay inlets and
outlets at different time points of the passing were got, and then to investigate the evolution
of the flow values of equipment bay inlets and outlets.
[ Keyword ] EMU Crossing in Open Air Equipment Bay Air Distribution.
1 前言
由于列车交会工况本身较为复杂,又加之设备舱内结构较为复杂,如若采用内外流场
同时计算的方法,会使得计算过程中的网格数量和质量极难控制,计算很难实现。通过研
究分析,将内外流场分开计算与同时计算在获得结果方面理论上是一致的,因此,本文采
用了将会车工况的外流场计算与设备舱的内流场计算分开进行的方法。
2 外流场计算
计算域的搭建
真实动车组的外形复杂,其长细比非常大,动车组底部和外表面细部特征复杂,且动
车组所处铁道的几何形状也较复杂。目前,无论从计算时间、计算机容量以及计算过程中
的技术问题考虑,要完全模拟动车组湍流外流场的三维绕流都是难以实现的。因此,有必
要对所计算的动车组几何模型进行适当的简化。简化的动车组模型忽略了转向架、受电弓、
车轮、车钩等细部物件, 采用头车、中间车和尾车编组,简化模型如图1所示