Abstract
Multiobjective topology optimization was performed for innovative design of airfoils at takeoff. An evolutionary algorithm employing a quadtree structure for solution encoding was coupled with a numerical fluid dynamics solver. The objective functions were to maximize lift and minimize drag, and constraint was imposed on the cross-sectional area to ensure design feasibility. Twenty-three non-dominated solutions were obtained through optimization. The number of airfoil elements and shapes of the solutions were confirmed to be diverse. Also, it was confirmed that a shape similar to flaps found in conventional designs was also generated.
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