基于CFD的深水隔水管螺旋列板几何参数优选

基于计算流体动力学方法(CFD),利用FLUENT软件计算亚临界雷诺数条件下隔水管和螺旋列板的升力系数和曳力系数等流场参数并进行对比;以流场参数为目标函数,建立正交数值模拟试验,并对螺旋列板几何参数进行敏感性分析,确定几何特性对列板性能的敏感度.结果表明:列板高度和条数对减振功效和曳力性能郁有显著影响;优化的几何参数组合可为现场应用中螺旋列板的结构设计提供参考.

CFD-based optimization for geometric parameters of deepwater riser helical strakes

Based on CFD theory, the difference of flow field parameters, including lift coefficient and drag coefficient, was compared and analyzed using FLUENT software, between helical strakes and riser in the subcritical conditions of Reynolds number. Taking flow field parameters as the objective function, an orthogonal experiment of numerical simulation was performed and the sensitivity analysis was applied on the helical strakes' geometric parameters to determine the sensibility of geometrical property. The results show that the variation of the strake height and the number of strip has a significant affection on vortex-induced vibration (VIV) suppression and drag force, and an optimized structure may provide the reference for the structural design.