Isoparametric Boundary Element Method Applied to the Rectangular and Delta Hydrofoils near the Free Surface

作     者：Hassan GHASSEMI Ahmad Reza KOHANSAL 

作者机构：Faculty of Marine TechnologyAmirkabir University of Technology 

出 版 物：《China Ocean Engineering》 (中国海洋工程（英文版）)

年 卷 期：2010年第24卷第2期

页      面：321-331页

核心收录：

学科分类：08[工学] 0824[工学-船舶与海洋工程] 082401[工学-船舶与海洋结构物设计制造] 

基　　金：Marine Industry Research Center  Amirkabir University of Technology 

主　　题：isoparametric boundary element method delta and rectangular hydrofoils hydrodynamic characteristics free surface 

摘      要：In this paper, the hydrodynamic characteristics and flow field around rectangular and delta hydrofoils, moving with a constant speed beneath the free surface are numerically studied by means of isoparametric boundary element method （IBEM）. The quantities （source and dipole strengths） and the geometry of the dements are represented by a linear distribution. Two types of three-dimensional hydrofoils （rectangular and delta） are selected with NACA4412 and symmetric Joukowski sections. Some numerical results of pressure distribution, lift, wave-making drag coefficients and velocity field around the hydrofoils are presented. Also, the wave pattern due to moving hydrofoil is predicted at different operational conditions. Comparisons are made between computational results obtained through this method and those from the experimental measurements and other numerical results which reveal good agreement.