[1]尹小春,卢耀辉,赵宏星,等.隧道工况下高速列车动态气密性数值分析方法[J].郑州大学学报(工学版),2022,43(05):52-58.
 Numerical Analysis Method for Dynamic Air Tightness Value of High-speed Train[J].Journal of Zhengzhou University (Engineering Science),2022,43(05):52-58.
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隧道工况下高速列车动态气密性数值分析方法()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年05期
页码:
52-58
栏目:
出版日期:
2022-08-22

文章信息/Info

Title:
Numerical Analysis Method for Dynamic Air Tightness Value of High-speed Train
作者:
尹小春 卢耀辉 赵宏星 史潇博 唐 波
文献标志码:
A
摘要:
高速列车通过隧道或者在隧道交会时,产生复杂的压缩波和膨胀波,由于车体不能完全密封,导致车内压力发生跟随性变化,引起乘客舒适度降低的问题。 通过建立高速列车车体内外流场的数值分析模型,在计算车体外表面压力波的基础上,以等效泄漏孔作为车体内外压力传递的接口研究车内压力的变化规律,提出了高速列车动态气密性指数计算方法。 首先,对比等效泄漏孔建模中长细比及位置对车内压力的影响,确 定了 包含等效泄漏孔的车体内外流场准确的数值模型;然后,建立了高速列车-隧道 CFD( computational fluid dynamics)模型,计算了高速列车隧道交会流场,获得了列车在隧道交会工况下车体外表面压力波;最后,将车体外表面压力波作为车体内外流场模型的激励,计算了车内压力变化,拟合数据后分析了车内压力变化率和动态气密指数,并与已有文献的实测数据进行了对比验证。 结果表明:等效泄漏孔的建模应采用长细比大于 1 ∶4的计算结果更合理;单节车气密性数值模型中泄漏孔的位置对车内压力影响不大;列车隧道会车工况下车体外流场大多处于负压状态,只有头车测点出现正压。 所提的车体 动态 气密 性分 析 模型 能 较 好 地 模 拟 车 内 压 力 波 动, 在 7. 05 cm2 等 效 泄 漏 面 积 和1 000 m 长隧道工况 下列车交会时 的动态气 密性指数仿 真计算结果为 66. 3,与已有文献结果接近。
Abstract:
When high-speed trains pass through or meet in the tunnel ,complex compression and expansionwaves will be generated. As the carbody cannot be completely sealed,the pressure inside the carboly willfollow the changes,causing uncomfort problems for passengers. By establishing a numerical analysis model ofthe inlet and outlet flow field of high-speed trains,and on the basis of calculating the pressure waves on thesurface of the vehicle ,the change law of the internal pressure was studied by using the equivalent leakage holeas the interlace for the pressure transmission inside and outside of the vehicle. And the calculation method ofthe dymamic air tightness index of the high-speed train was proposed. Firstly ,the effects of slenderness andposition on tlhe interior pressure in the modeling of equivalent leakage hole were compared, and the accuralenumerical model of the interior and exterior flow field with equivalent leakage hole was determined. Then , thecomputational fluid dynamics ( CFD) model of high-speed train-tunnel intersection was established ,and the flow field of high-speed train tunnel inlersection was calculated,and the surlace pressure wave of train wasobltained. Finally , the external surface pressure wave was used as the excitation of the internal and externalflow field of the model to calculale the internal pressure change. After filting the data , the internal pressurechange rale and dynamic airtight index were analyzed , and compared with the measured data in the literature.The results showed that the calculation results with slenderness grealer than 1 :4 were more reasonable for themodeling of equivalent leakage holes. In the numerical model of air tightness of single vehicle,the location ofleakage hole had litle effect on the internal pressure. Most of the external flow fields of the lrain meeting inlunnel were in a negative pressure stale , and only the head measurement points have positive pressure. Thedynamic air tightness analysis model proposed in this paper could better simulate the pressure fluctuation insidelthe vehicle. The simulation result of dynamic air tightness index during train passing ltunnel in the condition of7. 05 cm’equivalent leakage area and 1 000 m long tunnel was 66.3 , which was approximately consistent withthe literature results.
更新日期/Last Update: 2022-08-20