摘要
利用雷诺平均方程,采用SSTk-ω湍流模式,建立了一个研究海底管道水动力特性的数值模型。利用该模型在Re为对不同间隙比下定常流通过海底悬跨管道进行了数值模拟,得到了管道的升阻力系数并分析了升阻力与间隙比的关系。通过与试验数据和数值结果进行对比和对升阻力系数曲线作FFT变换,分析了该模型的可靠性,推测出临界间隙比,进而分析了尾涡形式及其产生与抑制机理。
A numerical model on pipeline＇s hydrodynamic characters is established using Unsteady Reynolds-Averaged Navier-Stokes equations with a SSTk -ω turbulence model. Steady boundary layer flow pasting a pipeline near the seabed has been investigated with the numerical model versus different gap to diameter ratios, then the drag, lift coefficient time-records and the relation between lift, drag force and the gap ratio are studied. The reliability and accuracy of the numerical model are identified by comparing present results with experimental dates and numerical results. Through doing FFT spectra analysis of the drag, lift coefficient time-records, the critical gap ratio is speculated and the suppression and development of the vortex shedding are performed.
出处
《中国海洋平台》
2011年第5期17-23,共7页
China offshore Platform
基金
国家自然科学基金:51009088
上海市自然基金(10ZR1414900)
中海油-上海交大深水技术中心项目:CN00CRC2009AHKY003
国家863计划课题:2008AA09A107
关键词
数值模型
海底管道
海底边界
水动力特性
圆柱绕流
边界层流
numerical model
pipeline
bottom boundary
hydrodynamic characteristics
flow around cylinder
boundary layer flow
