China Ocean Engineering

, Volume 32, Issue 1, pp 110–116 | Cite as

Hydrodynamics of the Semi-Immersed Cylinder by Forced Oscillation Model Testing

  • Chun-hui Song
  • Shi-xiao Fu
  • Xiao-ying Tang
  • Ke Hu
  • Lei-xin Ma
  • Tong-xin Ren
Article
  • 4 Downloads

Abstract

In this paper, the hydrodynamic coefficients of a horizontal semi-immersed cylinder in steady current and oscillatory flow combining with constant current are obtained via forced oscillation experiments in a towing tank. Three nondimensional parameters (Re, KC and Fr) are introduced to investigate their effects on the hydrodynamic coefficients. The experimental results show that overtopping is evident and dominates when the Reynolds number exceeds 5×105 in the experiment. Under steady current condition, overtopping increases the drag coefficient significantly at high Reynolds numbers. Under oscillatory flow with constant current condition, the added mass coefficient can even reach a maximum value about 3.5 due to overtopping while the influence of overtopping on the drag coefficient is minor.

Keywords

semi-immersed cylinder hydrodynamic coefficient forced oscillation experiment overtopping 

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Copyright information

© Chinese Ocean Engineering Society and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Chun-hui Song
    • 1
    • 2
  • Shi-xiao Fu
    • 1
    • 2
  • Xiao-ying Tang
    • 3
  • Ke Hu
    • 4
  • Lei-xin Ma
    • 5
  • Tong-xin Ren
    • 1
  1. 1.State Key Laboratory of Ocean EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.Collaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationShanghaiChina
  3. 3.School of Naval Architecture and Ocean EngineeringJiangsu University of Science and TechnologyZhenjiangChina
  4. 4.Tianjin Research Institute for Water Transport EngineeringTianjinChina
  5. 5.Massachusetts Institute of TechnologyCambridgeUSA

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