Influence of trains meeting on the ventilation performance of equipment compartment with independent air duct in high-speed train:numerical and experimental study  

作　　者：Yitong Wu Wei Zhou Xifeng Liang Xinchao Su Kewei Xu Yutao Xia Zhixin Wang Sinisa Krajnović 

机构地区：[1]Key Laboratory of Traffic Safety On Track,Ministry of Education,School of Traffic and Transportation Engineering,Central South University,Changsha 410075,China [2]Joint International Research Laboratory of Key Technology for Rail Traffic Safety,Central South University,Changsha 410075,China [3]Division of Fluid Dynamics,Department of Mechanics and Maritime Sciences,Chalmers University of Technology,SE‑41296 Gothenburg,Sweden

出　　处：《Railway Engineering Science》2025年第1期127-150,共24页铁道工程科学(英文版)

基　　金：support by Technology R&D Program of China State Railway Group Co.,Ltd(Grant number N2022J013);the Hunan Provincial Innovation Foundation for Postgraduate(Grant number CX20220279);the Fundamental Research Funds for the Central Universities of Central South University(Grant number 2022ZZTS0193);China Scholarship Council(202106370112)。

摘　　要：During the train meeting events,train equipment compartments are exposed to the worst pressure changes,potentially affecting the ventilation performance of equipment,particularly for electrical facilities equipped with independent air ducts.In this paper,a two-step method is used for numerical computation:(1)obtaining the temporal and spatial transient node data of the flow field sections during the train-passing simulation and(2)using the data as the input data for the equipment compartment simulation.In addition,this paper also compares the difference in equipment ventilation between the single-train and trainpassing scenarios in real vehicle tests.The results indicate that the primary factors influencing ventilation effectiveness are the aerodynamic compression and deceleration of airflow induced by the other train's nose,as well as the instability of the external flow field in the wake of the other train.During train crossing,the air is forced into the air duct,with a maximum ratio of the airflow in-duct to the airflow out-duct reaching 3.2.The average mass flow falls below the rated mass flow for the converter.Compared to the rated air volume of converter,the maximum suppression rates obtained from testing and simulation are-24.5%and-16.8%,respectively.Compared to the single-train operation,the maximum suppression rates obtained from testing and simulation are-15%and-18%,respectively.These findings provide valuable insights into the design and operation of high-speed trains.

关 键 词：Train-passing event Electrical facilities Independent air duct Ventilation performance 

分 类 号：O35[理学—流体力学]