摘要
运用范德华方程描述热侵袭下储罐内过热液体的大量蒸发现象,揭示了储罐压力骤升具有的尖点突变的特征,当压力为0.1～0.8MPa时,相应的失稳过热度在143.5～150.7K的范围内变化.能量平衡理论的计算表明:储罐因失效而引发的沸腾液体膨胀式蒸气爆炸(BLEVE)过程中,所释放的能量随过热液体温度的增加而增加.文中还对BLEVE的爆炸冲击波超压及人体安全距离进行了估算.研究结果可为LNG储运过程中此类事故的预防以及后果评估提供理论依据.
In this paper, the van der Waals equation is used to describe the gas-liquid phase transition of superheated liquefied natural gas （LNG）, which is found to display the characteristics of cusp-type catastrophe. The results show that, when the pressure changes from 0. 1 to 0. 8 MPa, the corresponding unstable superheated degree is in the range of 143. 5 - 150. 7K. According to the energy balance theory, the superheating energy increases with the temperature in the process of boiling liquid expanding vapor explosion （BLEVE） due to the failure of the tank. Moreover, the overpressure of explosion shock wave and the safety distance for people in BLEVE are estimated. The present research lays theoretical foundations for the accident prevention and consequence assessment of LNG during transportation and storage.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第10期189-193,共5页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50474034)
关键词
液化天然气
沸腾液体膨胀式蒸气爆炸
尖点突变
爆炸冲击波
liquefied natural gas
boiling liquid expanding vapor explosion
cusp-type catastrophe
explosionshock wave
