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optimization and design of an aircraft's morphing wing-tip demonstrator for drag reduction at low speed, Part Ⅰ–Aerodynamic optimization using genetic, bee colony and gradient descent algorithms

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Chinese Journal of Aeronautics 2017年第1期30卷 149-163页

作者： Andreea Koreanschi Oliviu Sugar Gabor Joran Acotto Guillaume Brianchon Gregoire Portier Ruxandra Mihaela Botez Mahmoud Mamou Youssef Mebarki LARCASE Laboratory of Applied Research in Active Control Avionics and Aeroservoelasticity Ecole de Technologie Superieure Montreal H3C1K3 Canada Aerodynamics Laboratory NRC Aerospace National Research Council Canada Ottawa K1A0R6 Canada

In this paper, an ‘in-house＇ genetic algorithm is described and applied to an optimization problem for improving the aerodynamic performances of an aircraft wing tip through upper surface morphing. The algorithm＇s performances were studied from the convergence point of view, in accordance with design conditions. The algorithm was compared to two other optimization methods,namely the artificial bee colony and a gradient method, for two optimization objectives, and the results of the optimizations with each of the three methods were plotted on response surfaces obtained with the Monte Carlo method, to show that they were situated in the global optimum region. The optimization results for 16 wind tunnel test cases and 2 objective functions were presented. The 16 cases used for the optimizations were included in the experimental test plan for the morphing wing-tip demonstrator, and the results obtained using the displacements given by the optimizations were evaluated.

关键词： Artificial bee colony airfoil optimization Genetic algorithm Morphing wing optimization

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Design optimization of unsteady airfoils with continuous adjoint method

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Applied Mathematics and Mechanics(English Edition) 2015年第10期36卷 1329-1336页

作者： Liang FANG Xiaowei LI Shanghai Institute of Applied Mathematics and Mechanics Shanghai University

In this paper, a new unsteady aerodynamic design method is presented based on the Navier-Stokes equations and a continuous adjoint approach. A basic framework of time-accurate unsteady airfoil optimization which adopts time-averaged aerodynamic coefficients as objective functions is presented. The time-accurate continuous adjoint equation and its boundary conditions are derived. The flow field and the adjoint equation are simulated numerically by the finite volume method （FVM）. Feasibility and accuracy of the approach are perfectly validated by the design optimization results of the plunging NACA0012 airfoil.

关键词： airfoil optimization continuous adjoint method unsteady flow

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Optimized Design of H-Type Vertical Axis Wind airfoil at Multiple Angles of Attack

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Fluid Dynamics & Materials Processing 2023年第10期19卷 2661-2679页

作者： Chunyan Zhang Shuaishuai Wang Yinhu Qiao Zhiqiang Zhang School of Mechanical Engineering Anhui Science and Technology UniversityFengyang233100China School of Mechanical Engineering Anhui Polytechnic UniversityWuhu241000China

Numerical simulations are conducted to improve the energy acquisition efﬁciency of H-type vertical axis wind turbines through the optimization of the related blade airfoil aerodynamic *** Bézier curve is initi-ally used toﬁt the curve proﬁle of a NACA2412 airfoil,and the moving asymptote algorithm is then exploited to optimize the design of the considered H-type vertical-axis wind-turbine blade airfoil for a certain attack *** results show that the maximum lift coefﬁcient of the optimized airfoil is 8.33%higher than that of the original *** maximum lift-to-drag ratio of the optimized airfoil exceeds the maximum lift-to-drag ratio of the ori-ginal airfoil by 11.22%.Moreover,the power coefﬁcient is increased by 12.19%and the torque coefﬁcient of the wind turbine is signiﬁcantly improved.

关键词： H-type vertical axis wind turbine Bézier curves moving asymptote algorithm airfoil optimization

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