LNG储罐泄漏危险性数值计算
Numerical Calculation of LNG Tank Leakage Risk
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- 引用格式:
-
季洁,韩雪峰.LNG储罐泄漏危险性数值计算[J].天然气与石油,2015,33(3):0.doi:
Ji Jie, Han Xuefeng.Numerical Calculation of LNG Tank Leakage Risk[J].Natural Gas and Oil,2015,33(3):0.doi:
- DOI:
- 作者:
- 季洁1,2韩雪峰1,2
Ji Jie, Han Xuefeng
- 作者单位:
- 1.南京工业大学城市建设与安全工程学院，2.江苏省危险化学品本质安全与控制技术重点实验室
1.College of Urban Construction and Safety Engineering, Nanjing Tech University; 2. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control
- 关键词:
- 扩散；模型；模拟；Matlab；浓度
Diffusion; Model; Simulation; Matlab; Concentration
- 摘要:
- 为解决LNG储罐泄漏扩散模拟分析过程中存在计算和分析过程过于复杂的问题，通过选取适当的气体扩散模型，利用Matlab编写程序，对甲烷气体的扩散进行快速模拟计算，形成气体扩散浓度分布图，预测甲烷蒸汽在向下风向扩散的过程中形成爆炸危险区域，并模拟分析风速、地表粗糙度、泄漏速率等因素对LNG泄漏气体扩散影响。研究结果表明，当风速方向和泄漏源泄漏方向一致时，甲烷蒸汽扩散距离和危险区域面积随风速增大呈减小趋势；甲烷蒸汽在下风向扩散距离及危险区域面积随着地表粗糙度的增大而减小；甲烷蒸汽扩散距离和危险区域面积随泄漏速率的增大而增大。
In order to simplify the complex calculation and analysis procedure in simulation analysis on LNG tank leakage and gas diffusion, selected is an appropriate gas diffusion model and applied is the Matlab program for conducting rapid simulation of methane gas diffusion and drawing a gas diffusion concentration distribution diagram so as to predict explosive and hazardous areas probably formed in downwind methane steam diffusion and to simulate effect of such factors as wind speed, ground roughness and LNG leakage rate on methane steam diffusion. Study results indicate that if the wind direction is in line with the diffusion direction, diffusion distance and hazardous areas show a trend of decrease along with wind speed and ground roughness increase, and diffusion distance and hazardous areas show a trend of increase along with leakage rate increase.
