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

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

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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/m3 if the fresh air change rate falls below 212 m3/h.This research provides a systematic approach and referenceable results for exploring formaldehyde pollution in high-speed train cabins.

indoor air pollutionformaldehydeCFD simulationhigh-speed trainventilation

Fan Wu、Hang Dong、Chao Yu、Hengkui Li、Qingmin Cui、Renze Xu

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Key Laboratory of Traffic Safety on Track,Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha 410075,Hunan,China

Joint International Research Laboratory of Key Technologies for Rail Traffic Safety,Changsha 410075,Hunan,China

National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle,Changsha 410075,Hunan,China

School of Software,Henan University of Engineering,Zhengzhou 451191,Henan,China

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国家自然科学基金graduate school of Central South UniversityHigh-Performance Computing Center of Central South University

520724131053320220012

2024

10.1007/s12273-023-1078-1

建筑模拟(英文版)

建筑模拟(英文版)

EI
ISSN：1996-3599
年,卷(期)：2024.17(2)
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