小区域氯气扩散的CFD模拟研究  

CFD simulation of small-scale chlorine dispersion

作　　者：王东东[1] 刘茂[1] 李剑峰[1] 何卫峰[1] 

机构地区：[1]南开大学城市公共安全研究中心,天津300071

出　　处：《安全与环境学报》2008年第3期126-130,共5页Journal of Safety and Environment

基　　金：国家科技支撑计划项目(200603746006)

摘　　要：针对一个较小的工厂区域,应用CFD法,分别对氯气连续泄漏和瞬时泄漏的扩散过程进行了研究,并应用FLUENT软件,分别对两种情况下的氯气扩散情况进行了模拟。结果表明,连续泄漏时,建筑的阻挡和涡旋的存在会减慢氯气扩散速度,使得建筑后方氯气浓度比周围空间低很多;瞬时泄漏时,涡旋对氯气扩散的束缚作用非常明显,涡旋内部的氯气停留时间比其他区域长。这些结果可以为应急救援和工厂结构优化设计提供依据。This paper intends to present its authors＇ development of a simulated model on a small-scale chlorine dispersion accident in a factory area. The purpose of this research is to work out a rather accttrate model which may account for the chlorine small-scale dispersion on a complex terrain by using a Fluid Dynamics （CFD） Computational tool. In doing so, first of all, the geometrical model of the construction in the factory was established in GAMBIT mode, with its mesh generated in the computational area. Secondly, a CFD Code FLUENT was applied to the study of the effects of different release scenarios on the dispersion in comparison with the dispersion results under different conditions. For continuous release scenarios, buildings and eddies may slow down the chlorine dispersion velocity, so as to result in a situation that the concentration behind the building clusters would be much slower than the other zones. In addition, for instantaneous scenarios, large amounts of chlorine would be trapped in the eddy zones, with chlorine staying in these zones continuously much longer. And, finally, this paper has also proved that the simulation results of the software FLUENT has been consistent with the theoretic analysis. Proposal for further work has been made, indicating that the monitored and experimental data developed in this paper can be used to validate the availability of software GAMBIT and FLUENT.

关 键 词：安全工程 氯气扩散 CFD FLUENT 

分 类 号：X928.5[环境科学与工程—安全科学]