摘要
针对阶段流作用下的大长细比海洋立管涡激振动试验所需的外流条件,根据实验室的基本情况,对试验流场进行了设计改造和数值模拟。根据数值模拟的结果,选定了试验流场的改造方案,并对改造后测得的试验数据和数值模拟的结果进行了对比分析。结果表明:在低流速时,模拟结果与试验流速吻合较好;在高流速时,数值模拟结果比试验流速略大。在误差允许的范围内,可以得到均匀分布的流场。
This paper presents an experiment on the marine riser under the effects of stepped current,which is in deepwater and with a big length to diameter ratio.Numerical simulations for flow field are carried out in order to improve experimental designs.And the experiment＇s outflow conditions are in accordance with laboratory＇s basic situations.The final scheme is decided based on the results of the numerical simulations,and comparative analysis is made between experimental and numerical data.The results show that the uniform flow field is achieved within tolerance by the experimental pool redesigned.Besides,the results of simulation are very similar to the experimental data of velocity in the condition of low velocity,but a little larger than real ones in the condition of high velocity.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第4期106-111,共6页
Periodical of Ocean University of China
基金
国家高技术研究发展计划项目(2010AA09Z303)资助
关键词
海洋立管
涡激振动
流场改造
数值模拟
marine risers
vortex induced vibration（VIV）
improved designs for the flow field
numerical simulations
