摘要
为了掌握河道穿越管道泄漏后,溢油在漏孔方向和河流速度影响下的迁移扩散规律,建立穿越河道输油管道泄漏扩散的CFD(计算流体动力学)数值模型,利用FLUENT建模并模拟了管道漏孔方向与水平方向夹角呈30°、60°、90°、120°和150°时,不同河流速度条件下溢油在河流中的扩散过程。结果表明,溢油到达水面的时间和水平迁移距离与漏孔角度变化影响不大,而与河流速度关系为正相关,无量纲分析进一步证实了此结论。在此基础上,采用高斯非线性拟合得到了溢油上升时间和水平迁移距离与河流速度和漏孔角度的关系式,其中拟合确定系数大于0.99。结果可为河道穿越管道溢油风险评价和事故应急策略的制定提供一定的理论指导。
To understand the migration and diffusion laws of oil spilling from the leaked river-crossing pipeline under the influence of the direction of leakage hole and the river speed,a computational fluid dynamics（ CFD） numerical model on leakage and diffusion of river-crossing oil pipeline was established. The diffusion processes of spilling oil in the river under different conditions of river speed when the angle between the direction of leakage hole on the pipeline and the horizontal direction was 30°,60°,90°,120° and 150° respectively were simulated by the modeling of FLUENT. The results showed that the time of spilling oil to reach water surface and the horizontal migration distance were rarely influenced by the change in angle of leakage hole,while they presented a positive correlation relationship with the river speed,and the dimensionless analysis proved this results further. On this basis,the relations of the rising time of spilling oil and the horizontal migration distance against the river speed and the angle of leakage hole were obtained by using Gauss nonlinear fitting,and the fitting determination coefficients were greater than 0. 99. The results can provide a certain theoretical guidance for risk assessment of oil spilling from river-crossing pipeline and the formulation of accident emergency strategies.
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2016年第9期128-132,共5页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(51174172)
教育部博士点专项科研基金项目(20125121110003)
关键词
溢油扩散
漏孔方向
迁移距离
无量纲分析
diffusion of spilling oil
directions of leakage hole
migration distance
dimensionless analysis
