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http://dx.doi.org/10.3744/SNAK.2010.47.2.113

A Numerical Study on the Influence of the Horizontal Gap upon the Cavitation Behavior of a Horn Type Rudder  

Seo, Dae-Won (Department of Naval Architecture and Ocean Engineering, Inha University)
Lee, Seung-Hee (Department of Naval Architecture and Ocean Engineering, Inha University)
Kim, Hyo-Chul (Jungseok Research Institute of International Logistics and Trade, Inha University)
Oh, Jung-Keun (Jungseok Research Institute of International Logistics and Trade, Inha University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.47, no.2, 2010 , pp. 113-121 More about this Journal
Abstract
Recently, as container ships become larger and faster, rudder cavitations are more frequently observed near the gap between the horn and rudder plates of the ships to cause serious damages to the rudder surface of the ship. The authors already have suggested through a series of model experiments and numerical computations that employment of an appropriate blocking device for gap flow may retard the gap cavitation. For examples, a cam device installed near the outer edges of the vertical gap or a water-injection device combined with a pair of half-round bars installed inside the gap can considerably reduce the gap cavitation. However, it is also found that effective blocking of the flow through the vertical gap results in growth of the cavitation near the horizontal gap instead. In the present study, effectiveness of the simultaneous blocking of the flow through the horizontal and vertical gaps of a horn type rudder in minimizing the damage by gap cavitation is studied. Additional blocking disks are inserted inside the horizontal gaps on the top and bottom of the pintle block and numerical computations are carried out to confirm the combined effect of the blocking devices.
Keywords
Horn-type rudder; Gap flow; Vertical gap; Horizontal gap; Cavitation; Numerical Simulation;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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