Numerical simulation of formaldehyde distribution characteristics in the high-speed train cabin  

作　　者：Fan Wu Hang Dong Chao Yu Hengkui Li Qingmin Cui Renze Xu 

机构地区：[1]Key Laboratory of Traffic Safety on Track,Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha,Hunan,410075,China [2]Joint International Research Laboratory of Key Technologies for Rail Traffic Safety,Changsha,Hunan,410075,China [3]National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle,Changsha,Hunan,410075,China [4]School of Software,Henan University of Engineering,Zhengzhou,Henan,451191,China

出　　处：《Building Simulation》2024年第2期285-300,共16页建筑模拟（英文）

基　　金：This work is supported by the National Natural Science Foundation of China(No.52072413);the graduate school of Central South University(No.1053320220012).The authors are grateful for resources from the High-Performance Computing Center of Central South University.

摘　　要：The global concern over indoor air pollution in public vehicles has grown significantly.With a focus on enhancing passengers’comfort and health,this study endeavors to investigate the distribution characteristics of formaldehyde within a high-speed train cabin by employing a computational fluid dynamics(CFD)model which is experimentally validated in a real cabin scenario.The research focuses on analyzing the impact of air supply modes,temperature,relative humidity,and fresh air change rate on the distribution and concentration of formaldehyde.The results demonstrate that the difference in average formaldehyde concentration between the two air supply modes is below 1.3%,but the top air supply mode leads to a higher accumulation of formaldehyde near the sidewalls,while the bottom air supply mode promotes a more uniform distribution of formaldehyde.Furthermore,the temperature,relative humidity,and fresh air change rate are the primary factors affecting formaldehyde concentration levels,but they have modest effects on formaldehyde’s distribution pattern within the cabin.As the temperature and relative humidity increase,the changes in formaldehyde concentrations in response to variations in these factors become more evident.Importantly,the formaldehyde concentration may surpass the standard limit of 0.10 mg/m^(3)if the fresh air change rate falls below 212 m^(3)/h.This research provides a systematic approach and referenceable results for exploring formaldehyde pollution in high-speed train cabins.

关 键 词：indoor air pollution FORMALDEHYDE CFD simulation high-speed train ventilation 

分 类 号：U27[机械工程—车辆工程]