多源重气泄漏扩散模拟研究  

Simulation research on leakage and dispersion of multi-source heavy gas

作　　者：朱红亚[1,2] 陈昊东[1] 王青松[1] 孙金华[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026 [2]公安部天津消防研究所,天津300381

出　　处：《中国科学技术大学学报》2014年第8期697-703,共7页JUSTC

基　　金："十二五"科技支撑计划(2011BAK07B01;2012BAK13B01)资助

摘　　要：由于重气效应的存在,重气的泄漏和扩散的危险性较之轻气更为严重.在单源SLAB模型的基础上发展了多源重气扩散模型,并对单源和多源重气在连续泄漏和瞬时泄漏两种泄漏模式下的扩散都进行了模拟研究.以氯气泄漏为研究算例,计算得到了相应条件下下风向的时均浓度分布情况,结合毒性标准给出了不同毒性水平下的事故后果影响范围,从而可以为应急救援和疏散决策制定提供理论指导.The risk from the leakage and dispersion of heavy gas is much more serious than that of light gas due to the existence of heavy gas effect .A multi-source dispersion model of heavy gas was developed on the basis of a single SLAB model .And the dispersion behaviors of single and multi-source heavy gas at the mode of continuous and instantaneous leakage were simulated .Then ,with a case study of chlorine ,the downwind time-averaged concentration distribution under corresponding conditions was calculated . Further ,combined with the toxicity criteria ,the accident-affected areas at different toxic levels were presented to provide theoretical guidance for emergency rescue and evacuation decision-making .

关 键 词：重气扩散 SLAB模型 多源 连续泄漏 瞬时泄漏 

分 类 号：X511[环境科学与工程—环境工程]