摘要
液化石油气(LPG)的泄漏扩散受多种因素的影响.利用数值计算的方法,在一定的太阳辐射下,考虑相对湿度,采用有限体积法(FVM)离散控制方程,采用SIMPLE方法处理速度与压力的耦合问题,采用离散坐标模型(DOM)求解辐射换热,得到不同相对湿度和有无太阳辐射条件下的质量分数分布图.旨在揭示环境相对湿度和太阳辐射对LPG泄漏扩散流动过程及其演变规律的影响.研究结果显示:相对湿度和太阳辐射对LPG泄漏扩散均有影响,相对湿度越大,LPG重气效果越明显;太阳辐射提高环境温度,增大了环境与LPG之间换热效率,使其温度升高,增大了泄漏扩散的速度.
It is studied that leakage and diffusion of liquefied petroleum gas（LPG）is affected by a variety of factors.And the factors affect the diffusion of LPG under the condition of sunlight and relative humidity.The finite volume method（FVM）is employed to solve the discrete governing equations,the SIMPLE method is used to deal with the coupling problem of velocity and pressure,and the discrete coordinate model（DOM）is adopted to solve the radiative heat transfer.The mass fraction distribution under different relative humidity and solar radiation is obtained in order to reveal diffusion process and its evolution law of LPG leakage and diffusion.The results show that relative humidity and solar radiation have an effect on LPG leakage and diffusion.The relative humidity is greater,and LPG heavy gas effect is more obvious.Solar radiation improves the ambient temperature,and enhances the environment and LPG heat transfer efficiency between the temperature and the speed of leakage.
作者
郝建超
董华
牟永强
张敬奎
林欢
HAO Jian chao;DONG Hua;MU Yong qiang;ZHANG Jing kui;LIN Huan(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266033,China)
出处
《青岛理工大学学报》
CAS
2018年第4期70-75,83,共7页
Journal of Qingdao University of Technology
基金
国家自然科学基金资助项目(11402180)
关键词
泄漏扩散
数值研究
相对湿度
太阳辐射
leakage and diffusion
numerical study
relative humidity
solar radiation
作者简介
郝建超（1990-），男，山东临沂人．硕士，研究方向为计算流体力学．Email：1048331037@qq．com;通信作者：董华，男，博士，教授，博士生导师．Email：dhual959@163．com．
