摘要
海洋立管在来流影响下极易发生涡激振动(VIV),VIV会对立管产生严重的疲劳破坏作用,导致立管很快失效.之前有大量的研究主要集中在如何采用有效措施抑制其影响,在工程中螺旋侧板的使用居多,螺旋侧板在设计中有很多参数,如螺距、侧板高度和覆盖率等.文中基于Fluent软件对不同导程螺旋侧板的立管的尾流场进行数值模拟.结果发现,螺旋侧板可以明显的抑制涡激振动的影响.同时得到:在研究范围内,螺旋侧板随导程增大控制旋涡发放效果越好,从而抑制涡激振动效果越佳;将数值模拟结果和文献的实验结果相比较,发现二者吻合良好,验证了数值模拟的可靠性.
Due to the serious fatigue damage of VIV（vortex-induced vibration）to the riser,it is very likely to failure soon.Much corresponding research has been done to deal with how to suppress the effect recently,and the helical strakes is widely used in engineering now.Many parameters have certain effects on its design in practice,including the height,pitch and coverage scale.The main aim of this paper is to study the wake field of a riser with different pitch by numerical simulation based on the Fluent software.In conclusion,the VIV can be obviously suppressed by the helical strakes,and the effectiveness of inhibiting vortex shedding is better with increasing the pitch of helical strakes.Besides,the numerical simulation has a good agreement with the experiment result of reference,which demonstrates the accuracy of research approach.
出处
《武汉理工大学学报（交通科学与工程版）》
2015年第1期175-179,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
关键词
螺旋侧板
导程
VIV
数值模拟
helical strakes
pitch
VIV
numerical simulation
