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Application of Coanda Effects to a Ship Hydrofoil  

Oh, Jung-Keun (Dept. of Naval Arch. ＆ Ocean Eng., RIMSE, Seoul National University)
Ahn, Hae-Seong (Dept. of Naval Arch. ＆ Ocean Eng., RIMSE, Seoul National University)
Kim, Hyo-Chul (Dept. of Naval Arch. ＆ Ocean Eng., RIMSE, Seoul National University)
Lee, Seung-Hee (Dept. of Naval Arch. ＆ Ocean Eng., CTYS, Inha University)
Lew, Jae-Moon (Dept. of Naval Arch. ＆ Ocean Eng., Chungnam National University)
Publication Information
Journal of Ship and Ocean Technology / v.7, no.2, 2003 , pp. 29-39 More about this Journal
Abstract
A Coanda foil is a high-lift generating device exploiting the phenomena that flow separation is delayed if a high-speed jet is applied tangential to the surface as well known to the aerodynamic fields. In the present study, a Coanda foil with a flap is investigated to seek the possibility of marine application. Model experiments are carried out both in a towing tank and cavitation tunnel and surface pressure distributions, forces and moments acting on the foil are measured at the various angle of attacks and flap angles. The results are also compared to the numerical ones to show good agreements. The results of the present study demonstrate the practical applicability of the Coanda foil in the design of ship control surfaces.
Keywords
Coanda foil; ship control surface; high lift device; boundary layer control;
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