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http://dx.doi.org/10.3744/SNAK.2012.49.2.203

Experimental Approach for Estimation of Hydrodynamic Force Acting on a Submerged Streamlined Body Translating in a One-end-opened Cylindrical Tube  

Yeo, Dong-Jin (Daedeuk branch, Korea Ocean Research & Development Institute)
Kim, Yeon-Gyu (Daedeuk branch, Korea Ocean Research & Development Institute)
Kim, Dong-Hun (Agency for Defense Development)
Publication Information
Journal of the Society of Naval Architects of Korea / v.49, no.2, 2012 , pp. 203-211 More about this Journal
Abstract
The main object of this experiment is to estimate the hydrodynamic forces acting on a submerged streamlined body placed in a one-end-opened cylindrical tube moving with certain translational velocity. The best experimental design for this object is mimicking real situation, however sizes of model body and cylinder tube are just the same as those of real, for avoiding scale effects, mimicking real situation is not realizable. Hence, in this experiment, target body and cylindrical tube were designed to be towed with varying body position relative to cylindrical tube. For measuring hydrodynamic forces and flow velocity in the cylindrical tube, six one-component load cells and several one-hole Pitot tubes were used. Several conditions were checked with various end-plates those had different opening areas. Experiment results show that forces and flow velocity had different tendency with those expected, and the presence of a end-plate slows down the flow velocity in the cylindrical tube and affects pressure field in the tube to push the model submerged body forward of the tube. This tendency grows with decreasing opened area.
Keywords
Hydrodynamic force; Submerged streamlined body; One-end-opened cylindrical tube; Load cell; One-hole pitot tube;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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