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Proceedings of the Spring Meeting of the Society of Naval I Cr%-ot-2,%4-o © ETDE-/of- m?- - ?1731593 - cmiem im-mm-mm- mm) i-i mmt>o©^nus-ita gg%-sm mi-f# #...... (T) .................................................................................................jus 3s#-sm ...... (n/ 1- 3 JS7X^ HtjJfJKKS-o* < Sj&ffcc i % .....................................................................................................j&# £$•■ 21 1- 4 Numerical Study on the Aerodynamic Characteristics of a Three-Dimensional Power-Augmented Ram Wing in Ground Effect .................................. 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Images are produced from the best available original document 1 1-1 ©SEiLlf ie* it Ba e ie* & e m %* IE* F 32: m** Numerical Simulation for Submerged Body Fitted with Hydrofoil by Boundary Element Method by Satoshi Masuda, Member, Yoshikazu Kasahara, Member Isao Ashidate, Member Summary Recently many kinds of high speed boats have been developed. The hydrofoil type is one of them. On considering the hydrofoil type, one important problem is interaction, for example, interaction between the main hull and the hydrofoil, the hydrofoil and the free surface etc. Here we consider the interaction between the free surface and a submerged lifting body by numerical simulation. The submerged lifting body is composed of a submerged body and a hydrofoil adapted to it. The numerical method is the Boundary Element Method (BEM) that was originally developed at Hiroshima Univer­ sity by Mori and Qi., We have modified the original method and have applied it to this case. We measured the lifting force and the pressure distribution on the hydrofoil in the NKK Tsu' Ship Model Basin, and confirmed that BEM is an effective method for the interaction problem between the free surface and a submerged lifting body. 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