LPG槽罐车泄漏爆炸数值模拟研究  

Study on numerical simulation of leakage and diffusion of LPG tanker

作　　者：宋晓燕[1] 苏含琴 谢中朋[2] SONG Xiao-yan;SU Han-qin;XIE Zhong-peng(School of Safety Engineering,North China Institute of Science and Technology,Langfang 065201,Hebei,China;School of Management and Engineering,Capital University of Economics and Business,Beijing 100070,China)

机构地区：[1]华北科技学院安全工程学院,河北廊坊065201 [2]首都经济贸易大学管理工程学院,北京100070

出　　处：《工程爆破》2023年第6期153-157,共5页Engineering Blasting

基　　金：北京市教育委员会科学技术研究计划基金资助项目(KM202010038002)。

摘　　要：为研究液化石油气(LPG)泄漏扩散及爆炸的危害及范围,采用Phast程序中的UDM模型对LPG泄漏爆炸进行数值模拟,首先通过事故案例验证Phast程序和UDM模型的可行性,而后分析泄漏孔径、环境因素等对扩散和爆炸影响范围等趋势。结果表明,LPG槽罐车泄漏孔径小,气体流速越小,越容易受到风速和天气情况的影响。孔径增大时,在上风向也有部分热辐射扩散,并且受到风速影响越小,扩散从5cm椭圆形向下风向扩散,到15cm近乎为以圆形扩散。喷射火的辐射能量大致呈抛物线形状;随着泄漏孔径的扩大,热辐射的峰值越大,影响范围越远。In order to study the hazard and scope of Liquefied Petroleum Gas(LPG)leakage,diffusion and explosion,the UDM model in the PHAST program is used to numerically simulate the LPG leakage and explosion.First,the feasibility of the PHAST program and the UDM model is verified through accident cases,and then the leakage aperture is analyzed,environmental factors and other trends on the scope of diffusion and explosion effects.The results show that the smaller the leakage aperture of the LPG tanker and the smaller the gas flow rate,the easier it is to be affected by the wind speed and weather conditions.When the aperture increases,some heat radiation diffuses in the upwind direction,and the less affected by the wind speed,the diffusion from 50 mm ellipse to downwind diffusion to 150 mm is almost circular.The radiant energy of jet fire is roughly parabolic.With the expansion of the leakage aperture,the larger the peak of thermal radiation,the influence range is the farther.

关 键 词：数值模拟 LPG罐车 爆炸 

分 类 号：X932[环境科学与工程—安全科学]