摘要
客车乘员舱空气品质与乘客大众身心健康息息相关,甚至直接关系到客车司机的驾驶安全。基于PISO(pressure-implict with splitting of operators)压力-速度耦合方案,采用Realizable k-ε湍流模型并运用欧拉混合法,模拟了某型空调城市客车内不同位置乘员的喷嚏活动及喷嚏污染物与空气的相间耦合流动,分析了室内气流组织流动规律,总结了该城市客车室内喷嚏污染物的浓度分布特点,揭示了喷嚏污染物的传播机理。针对喷嚏污染物分布范围大及其长时间滞留于地板附近的健康隐患问题,对空调送、排风口布置进行了改进,结果显示喷嚏污染物的沉积量显著减少,同时扩散范围有很大程度地缩小。
Study on the passenger car air quality is closely linked to the physical and mental health of the occu- pants, and even directly related to the bus driver＇s driving safety. Based on the PISO（ pressure-implict with splitting of operators） pressure-velocity coupling scheme, by applying the realizable κ-εturbulence model and the euler mix- ture method, a numerical simulation about the passenger sneezing activities has been created at different positions of a certain type air conditioning urban bus, and a phase to phase coupling between sneezing pollutants and the air has been simulated. By studying the simulation results, the interior air flow pattern was analyzed, the characteristics of the concentration distribution of the interior sneezing pollutants in the urban bus were summarized, and the propaga- tion mechanism of the sneezing pollutants was revealed. Taking the health risks of the sneezing pollutants＇ large diffusion range and the long time retention into consideration, an improvement of the air supply and outlet arrange- ment has been established in this research by which shows the deposition and the diffusion range of the pollutants was significantly reduced
出处
《科学技术与工程》
北大核心
2014年第12期277-283,共7页
Science Technology and Engineering
基金
交通运输部新世纪十百千人才培养项目(20120222)
湖南省"十二五"重点学科(机械工程)
湖南工业大学自然科学项目(2013HZX05)资助
关键词
客车空气品质
数值模拟
欧拉混合法
悬浮生物颗粒
空调通风
passenger car air quality numerical simulation euler mixture method suspended biological particles air conditioning and ventilation
