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A genetic algorithm (GA) based optimization technique is used in combination with boundary element method. Firstly, the boundary etement method is applied to analyze the hydrofoil for a wide range of angles of attack, aspect ratios, and maximum camber and thickness ratios assuming that the thickness and camber distributions of hydrofoil section are given. Then the lift, drag and ether parameters involved in the imposed constraints are approximated by the seconddegree polynomial functionsdoi:10.14856/kansaikoron.13.0_17 fatcat:hrdu3x2povgvrgtz6lgok27td4