摘要
在考虑羽流阻力的情况下,采用拉格朗日控制单元积分法建立了羽流动力学模型,并采用数值技术对水下溢油羽流动力学特性进行了模拟,详细分析了释放角对羽流运动的影响。模拟结果及分析表明,当释放方向不同时,浮力在羽流轴线上的投影分量不同。在不同的浮力分量作用下,羽流的运动轨迹及羽流速度、浓度和半径随着流程的变化会呈现不同的特点。羽流的这些运动特点可能会使得溢油到达水面的时间及位置随释放角的不同而发生变化。
Considering plume resistance, the plume dynamics model is developed using Lagrangian control unit integral method, which is used to simulate the plume movement characteristics in underwater oil spill. On the basis of simulated results, the influence of the oil release angle on the parameters of plume is analyzed in detail.The simulation results and analysis show that change in the direction of oil release will result in a change in the projection component of the buoyancy force on the plume axis. Under the effect of different buoyancy components, this will in turn affect the process in trajectory, velocity, concentration and radius of plume along flow direction. Eventually, the time taken for oil to appear firstly at the water surface as well as its approximate location will also change as the oil release angle changes.
作者
张军
何宏舟
杨绍辉
李晖
李海山
ZHANG Jun , HE Hong -zhou , YANG Shao -hui , LI Hui , LI Hai - shan(College of Mechanical and Energy Engineering, Jimei University, Fujian Province Key Laboratory of Energy Cleaning Utilization and Development, Xiamen 361021, Fujian Province, Chin)
出处
《海洋技术学报》
2018年第2期85-90,共6页
Journal of Ocean Technology
基金
福建省自然科学基金资助项目(2014J01201)
福建省科技计划资助项目(2017H0024)
关键词
水下溢油
释放角
羽动力学特性
数值模拟
underwater oil spill
oilrelease angle
plume dynamics
numerical simulation
