摘要
【目的】准确预测显著黏性效应下结构物所受流体作用力。【方法】采用有限体积(FVM)方法构建两相流数值波浪水槽模型。首先,通过半潜水平圆柱受波浪力数值结果与前人实验数据的对比,验证数值模型的准确性。其次,对不同流体黏性下,受迫振荡淹没水平圆柱上的流体作用力进行数值计算,通过黏性流结果和势流结果的对比,分析流体黏性对圆柱受力的影响特征。最后,通过将黏性流和势流理论压力结果对比,并结合对圆柱周围黏性涡量场分布特征分析,解释不同流体黏性下,黏性流与势流结果之间出现差异的原因。【结果】在不同流体黏性条件下,圆柱所受各倍频流体作用力均出现一定程度上的差别,表明流体黏性的影响明显。【结论】相比势流理论,采用黏性流理论对受迫振荡水平圆柱受力的影响的研究更为准确。
【Objective】To accurately predict the hydrodynamic force of a circular structure under viscous fluid effects.【Method】A viscous fluid numerical wave tank model was established by using the finite volume method.Firstly,the accuracy of the numerical model was validated against available experimental data for the wave forces on a semi-submerged circular cylinder.Secondly,the viscous numerical calculations for different fluid viscosities were carried out.The comparisons of the hydrodynamic forces on the circular cylinder predicted by the viscous fluid model and the potential flow model were conducted to show the viscous effects on the hydrodynamic forces.Finally,by studying the components of the pressure forces and the viscous shear forces,and by analyzing the vorticity fields around the cylinder,the reasons for the differences between the results based on the viscous fluid theory and the potential flow theory were explained.【Result】There are different degrees of differences among the harmonic components of the hydrodynamic forces on the horizontal circular cylinder under different viscosities.【Conclusion】The numerical results predicted by the viscous fluid model are more accurate than those from the potential flow models.
作者
袁剑平
毛鸿飞
赫岩莉
潘新祥
贾宝柱
YUAN Jian-ping;MAO Hong-fei;HE Yan-li;PAN Xin-xiang;JIA Bao-zhu(College of Ocean Engineering,Guangdong Ocean University,Zhanjiang 524088,China;College of Ocean Transportation,Guangdong Ocean University,Zhanjiang 524088,China)
出处
《广东海洋大学学报》
CAS
2020年第4期116-123,共8页
Journal of Guangdong Ocean University
基金
广东省自然科学基金(51979045,51479017)
国家装备预研基金项目(6142204190711)
国家国防科工局稳定支持课题(JCKYS2019604SXJQR-02)
广东省教育厅重点领域专项(2019KZDZX1024)
广东省教育厅高校青年创新人才项目(2019KQNCX045)
广东海洋大学科研启动费项目(120602-R19024)
广东省“冲一流”省财政专项资金建设项目(231419010).
关键词
圆柱
受迫振荡
流体作用力
数值模拟
波浪水槽
circular cylinder
forced oscillation
hydrodynamic forces
numerical simulation
wave tank
