【作者】 鞠少栋； 陈国明； 孙友义； 畅元江；

【Author】 JU Shaodong~1,CHEN Guoming~1,SUN Youyi~(1,2),CHANG Yuanjiang~1 (1.Centre for Offshore Engineering and Safety Technology,China University of Petroleum, Dongying 257061,China;2.CNOOC Research Institute,Beijing 100027,China)

【机构】 中国石油大学海洋油气装备与安全技术研究中心； 中海油研究总院；

【摘要】 基于计算流体动力学方法(CFD),利用动网格技术对包裹有短减振器的隔水管柱进行涡激振动数值模拟,研究短减振器的涡激抑制效果与机理,并对减振器尾角结构进行优化分析。减振器使得来流趋于流线性,大幅削弱了交替泄放的漩涡强度,因而可有效降低管柱的响应振幅。合理设计的短减振器可降低管柱的响应频率和曳力系数,且响应频率和曳力系数随着减振器尾角的减小而减小。综合考虑减振器的减振性能与曳力性能,减振器尾角应小于60°。更多还原

【Abstract】 Based on CFD theory,numerical simulation of vortex-induced vibration(VIV) of the riser infolded by short farings is carried out by the use of dynamic mesh technique.VIV suppression effects of short fairings are studied and the optimization of fairing tail angle is performed.beacause of fairings making incidence current streamlined and weakening vortex strength substantially the amplitude of the riser response can be effectively reduced.Short fairings can reduce the response frequency and drag coefficient by appropriate design,and the response frequency and drag coefficient decrease as the fairing tail angle decreasing. Considering the absorption of vibration performance and drag performance,the fairing tail angle should be less than 60 degrees.更多还原