封闭厂房氨气泄漏扩散规律数值模拟研究  

Numerical simulation of the leakage and diffusion of ammonia gas in closed workshops

作　　者：马隽湫 廖晓玲 李海航 王强 金建波 赵哲明 陈卫平 MA Junqiu;LIAO Xiaoling;LI Haihang;WANG Qiang;JIN Jianbo;ZHAO Zheming;CHEN Weiping(College of Quality and Safety Engineering,China Jiliang University,Hangzhou 310018,China;Hangzhou Special Equipment Inspection and Research Institute,Hangzhou 310051,China;Zhejiang Fine Brigade,Hangzhou 310014,China)

机构地区：[1]中国计量大学质量与安全工程学院,浙江杭州310018 [2]杭州市特种设备检测研究院,浙江杭州310051 [3]浙江省消防总队,浙江杭州310014

出　　处：《中国计量大学学报》2019年第1期104-109,共6页Journal of China University of Metrology

基　　金：国家质检总局科技计划项目(No.2016QK143);浙江省科技计划项目(No.2017C33150);杭州市科技计划项目(No.20180533B20);建筑消防工程技术公安部重点实验室开放课题(No.KFKT2015ZD02)

摘　　要：目的:为准确预测空间内氨气泄漏浓度分布并指导探测器安装工作。方法:采用FDS软件研究封闭厂房内氨气扩散规律。结果:氨气在密闭空间内泄漏后,扩散过程可分为上浮至顶棚、沿顶棚扩散和沉降分层三个阶段。出现高浓度氨气区域的规律可以归纳为"从泄漏源顶部位置,移到全厂房最高位置"。结论:建议氨气探测器首先要安装在空间全局几何中心最高顶棚处,再根据保护范围安装在一定距离外的顶棚较高处。此外,不同泄漏孔口朝向和泄漏速率对氨气分布的影响有待研究。Aim:This paper aims to predict the distribution of ammonia gas leakage in closded workshops and guide the detector installation.Methods:Fluid dynamics software(FDS) was adopted to simulate the diffusion of ammonia gas in a closed workshop.Results:The results showed that the diffusion process of ammonia in a confined space could be summarized as three stages:floating up to the ceiling,spreading along the ceiling,and subsiding and layering.The rule of high concentration location could be summarized as "moving from the ceiling above the leakage source,to the highest position of the plant".Conclusions:The ammonia gas detector should be installed on the top point and some other higher points of the ceiling.The influences of leakage orifices orientation and leakage rate on the distribution of ammonia gas remains to be studied.

关 键 词：计量 封闭空间 氨气泄漏 生产厂房 FDS模拟 探测器安装 

分 类 号：TB99[一般工业技术—计量学]