孔径对液化天然气泄漏扩散影响的数值模拟  

Numerical simulation of the effect of leakage aperture on the leakage and diffusion of liguefied natural gas

作　　者：周宁[1] 钱星伊 李雪[1] 张倩[1] 徐莹莹 余勇彬 梁依婷 ZHOU Ning;QIAN Xingyi;LI Xue;ZHANG Qian;XU Yingying;YU Yongbin;LIANG Yiting(School of Petroleum and Natural Gas Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学石油与天然气工程学院,江苏常州213164

出　　处：《常州大学学报(自然科学版)》2025年第2期43-51,共9页Journal of Changzhou University:Natural Science Edition

基　　金：江苏省“六大人才高峰”高层次人创新人才团队资助项目(TD_JNHB-013);江苏省研究生科研与实践创新资助项目(SJCX24_1679)。

摘　　要：采用Fluent软件建立液化天然气(LNG)连续泄漏计算流体力学(CFD)模型,开展不同孔径工况下LNG泄漏扩散过程的数值模拟研究。结果表明泄漏孔径对液池尺寸和液池汽化速率的影响较大,当泄漏孔径小于0.13 m时,液池面积随泄漏孔径增加而缓慢增加,但当泄漏孔径大于0.13 m时,液池面积随泄漏孔径增加呈急剧增加,且泄漏孔径越大,气云体积分数和形成的危害区域范围均越大,气云的持续时间越久,受灾区域暴露在危害气云的时间越久。研究结果对准确预测事故危险范围、设计安全距离、制定应急预案和事故后果的安全评价等均有重要意义。The computational fluid dynamics(CFD)model of liguefied natural gas(LNG)continuous leakage was established by Fluent,and the numerical simulation of LNG leakage and diffusion process under different leakage aperture was carried out.The results show that the leakage aperture has large influence on the size and gasification rate of the liquid pool.When the leakage aperture is less than 0.13 m,the liquid pool area increases slowly with the increase of the leakage aperture,but when the leakage aperture is greater than 0.13 m,the liquid pool area increases sharply.At the same time,the larger the leakage aperture,the larger the concentration of gas cloud and the cover of hazard area,which indicates that the longer the duration of the gas cloud,the longer the exposure time of the affected area to the hazard concentration.The research results are of great significance to accurately predict the accident hazard area,to design the safety distance,to formulate the emergency plan and to evaluate the safety of the accident consequence.

关 键 词：液化天然气 泄漏孔径 数值模拟 泄漏扩散 

分 类 号：TE88[石油与天然气工程—油气储运工程]