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http://dx.doi.org/10.3744/SNAK.2010.47.4.543

A Study for Improvement of Lift Performance of a Horn-type Rudder with the Coanda Effect  

Seo, Dae-Won (Department of Naval Architecture and Ocean Engineering, Inha University)
Oh, Jung-Keun (Jungseok Research Institute of International Logistics and Trade, Inha University)
Lee, Seung-Hee (Department of Naval Architecture and Ocean Engineering, Inha University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.47, no.4, 2010 , pp. 543-552 More about this Journal
Abstract
The Coanda effect is noticeable when a jet stream is applied tangential to a curved surface since then the jet stream remains attached to the surface beyond the point where flow separates otherwise and results in augmentation of circulation and lift. Numerous experimental and numerical studies have been performed in various fields of aerodynamics to exploit the Coanda effect and many of them found to be useful. It can be speculated that the Coanda effect may have practical application to the field of marine hydrodynamics as well since various control surfaces are being used to control behaviors of ships and offshore structures. In the present study, the Coanda effect has been applied to a horn type rudder and a series of numerical computations and model experiments are performed to find the practical applicability. The results indicate that the Coanda jet increases the lift coefficient of the rudder as much as 52% at the momentum coefficient $C_j$ = 0.1 and the rudder angle ${\alpha}=10^{\circ}$.
Keywords
Coanda effect; Jet nozzle; Model test; CFD; Horn-type rudder;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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