Experimental investigation on drag coefficient for a Truss Spar subjected to vortex induced motions
作者单位：State Key Laboratory of Ocean EngineeringShanghai Jiao Tong University
会议名称：《第十一届全国水动力学学术会议暨第二十四届全国水动力学研讨会并周培源诞辰110周年纪念大会》
会议日期：2012年
学科分类：08[工学] 0824[工学-船舶与海洋工程] 082401[工学-船舶与海洋结构物设计制造]
基 金：supported by the National Natural Science Foundation of China(40906049)
关 键 词：Truss Spar vortex-induced motions drag coefficient
摘 要：Drag coefficient of a bluff body is a crucial parameter for studying fluid-structure interaction *** characterizes the magnitude of drag force on the *** larger the drag coefficient is,the larger distance the structure is away from its initial *** it is very important in designing the Truss *** the existence of vortex-induced motion(VIM) often exaggerates the drag coefficient. The 1:60 scale Truss Spar model tests have been conducted in towing tank at Zhejiang Ocean University(ZOU).The Truss Spar model consists of a hard tank with removable helical strakes,a truss section and a square soft *** coefficients for both stationary and vibrating Truss Spar were carefully *** current flow is uniform in all test cases and the Reynolds number is from 7E04 to *** was found that the drag coefficient of vibrating Truss Spar is obviously larger than that of stationary Truss Spar,and the drag coefficient of the Truss Spar with strakes is larger than that of the Truss Spar without *** the drag coefficient is also affected by current headings.