教授 博士生导师 硕士生导师
主要任职: 建设工程学院副院长
其他任职: 海岸和近海工程国家重点实验室主任
性别: 男
毕业院校: 大连理工大学
学位: 博士
所在单位: 建设工程学院
学科: 港口、海岸及近海工程. 流体力学
办公地点: 海岸和近海工程国家重点实验室A309
联系方式: 0411-84708267
电子邮箱: dzning@dlut.edu.cn
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论文类型: 期刊论文
发表时间: 2019-10-01
发表刊物: JOURNAL OF HYDRODYNAMICS
收录刊物: EI、SCIE
卷号: 31
期号: 5
页面范围: 887-899
ISSN号: 1001-6058
关键字: Submerged horizontal circular cylinder; forced oscillation; hydrodynamic forces; vortex effect
摘要: As a classical topic, the hydrodynamic forces on a submerged horizontal cylinder undergoing forced oscillation have been widely studied based on potential flow theory. However, the fluid viscosity and the flow rotation may play an important role when the oscillation amplitude of the circular cylinder is large, and large discrepancy will occur between the potential flow simulation and the experimental results. This study focuses on the study of hydrodynamic forces on a submerged horizontal circular cylinder undergoing forced oscillation by means of a viscous fluid numerical wave tank (NWT) model. The accuracy of the numerical model is validated against available experimental data. The comparisons between the hydrodynamic forces on the circular cylinder predicted by the viscous fluid model and the potential flow model are conducted to show the viscous effects on the hydrodynamic forces. By the study on the flow fields, the mechanism of the viscous effects is explained by the vortex effect. The basic reason for the difference between the results based on the viscous fluid theory and the potential flow theory is revealed by analyzing the force components.