防护工程口部人员携入污染物数值模拟Numerical simulation for contaminant dispersion induced by human-walking at the gateway of civil protection engineering
武煜,史喜成,韩浩,高晓强
摘要(Abstract)：
外界染毒人员通过防护工程口部携入的有毒污染物会破坏内部安全性。使用高精度曲面3维人体模型,结合雷诺时均方程与大涡模拟耦合的方法模拟人员通过防护工程口部时卷携颗粒污染物的过程。首先以人体尾涡扩散过程和门洞断面的速度通量为考察对象,描述尾涡演化规律,然后改变行进速度、初始距离,考察速度通量对这些因素的敏感程度,完成人员行进特征流场的研究;通过计算行进方向上断面的不均匀度和清洁空间的污染物累积量,描述污染物向清洁区扩散的时空变化过程,完成对携入污染物过程的研究。结果表明:与国外相关文献工作相比,该方法可以较小的计算资源捕捉到相似的尾涡发展扩散过程;人员通过门洞时间与携入的污染物体积分数出峰时间(Tp)线性相关,且其与峰值(Vmax)呈指数关系,携入清洁室的污染物约占污染物总量的3%。
关键词(KeyWords)： 环境工程学;人员尾流;污染物扩散;防护工程口部
基金项目(Foundation):
作者(Author): 武煜,史喜成,韩浩,高晓强
参考文献(References)：
- [1]XU Xinxi(徐新喜),ZHAO Xiuguo(赵秀国),LIU Yajun(刘亚军).Numerical simulation and inspection for the distribution of the biological contaminants inside the emergency ambulance with overpressure protection[J].Journal of Safety and Environment(安全与环境学报),2010,10(1):185-188.
- [2]LIANG Qiang(梁强),WEI Dong(魏东).A numerical simulation mode of a pressurized smoke-removable air supply systems in a subway station[J].Journal of Safety and Environment(安全与环境学报),2011,11(4):226-230.
- [3]POUSSOU S B,MAZUMDAR S,PLESNIAK M W,et al.Flow and contaminant transport in an airliner cabin induced by a moving body:model experiments and CFD predictions[J].Atmospheric Environment,2010,44(24):2830-2839.
- [4]MAZUMDAR S,POUSSOU S B,LIN C-H,et al.Impact of scaling and body movement on contaminant transport in airliner cabins[J].Atmospheric Environment,2011,45(33):6019-6028.
- [5]WANG J,CHOW T-T.Numerical investigation of influence of human walking on dispersion and deposition of expiratory droplets in airborne infection isolation room[J].Building and Environment,2011,46(10):1993-2002.
- [6]CHOI J I,EDWARDS J R.Large eddy simulation and zonal modeling of human-induced contaminant transport[J].Indoor Air,2008,18(3):233-249.
- [7]CHOI J I,OBEROI R C,EDWARDS J R,et al.An immersed boundary method for complex incompressible flows[J].Journal of Computational Physics,2007,224(2):757-784.