An improved meshing method for shape optimization of aerodynamic profiles using genetic algorithms

Lopez, Diego I.; Angulo, Carlos; Macareno, Luis María

doi:10.1002/fld.1734

Cited by 10 publications

(6 citation statements)

References 11 publications

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“…Thus, the meshing method used in this study was designed to accomplish three objectives: the robustness of the mesh generation process, the accuracy of the meshes, and an affordable mesh cost. Using this framework, a reliable meshing procedure for GA optimization problems was developed [19]. Instead of deforming the previous grid, a new mesh is reconstructed by dividing the domain into mesh blocks, which vary according to the geometry of the profile.…”

Section: Meshing Methodmentioning

confidence: 99%

“…The block boundaries starting from the wall were designed according to the slope of the wall in the same way as a previous study [19], but the boundaries opposite to the wall are now straight and independent of the airfoil. As the family of the mesh lines "parallel" to the flow direction is calculated by linear interpolation between the wall and its opposite straight frontier, these mesh lines become more similar to the wall as one moves towards it.…”

Section: Meshing Methodmentioning

confidence: 99%

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Framework for the Shape Optimization of Aerodynamic Profiles Using Genetic Algorithms

Lopez

Angulo

Bustos

et al. 2013

Mathematical Problems in Engineering

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This study developed a framework for the shape optimization of aerodynamics profiles using computational fluid dynamics (CFD) and genetic algorithms. A genetic algorithm code and a commercial CFD code were integrated to develop a CFD shape optimization tool. The results obtained demonstrated the effectiveness of the developed tool. The shape optimization of airfoils was studied using different strategies to demonstrate the capacity of this tool with different GA parameter combinations.

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Section: Meshing Methodmentioning

confidence: 99%

Section: Meshing Methodmentioning

confidence: 99%

Framework for the Shape Optimization of Aerodynamic Profiles Using Genetic Algorithms

Lopez

Angulo

Bustos

et al. 2013

Mathematical Problems in Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, these methods are not robust and often converge to local optima. Therefore, it is necessary to use slower but more reliable and robust algorithms, such as the genetic algorithms, simulated annealing algorithm, and neural network algorithm. Hybrid methods combining these 2 categories of algorithms have also been used .…”

Section: Overall Optimization Approachmentioning

confidence: 99%

Overall design optimization of dedicated outboard airfoils for horizontal axis wind turbine blades

Yang

Liao

et al. 2018

Wind Energy

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Designing the primary airfoils for the outboard part of wind turbine blades is a complicated problem of balancing structural, aerodynamic, and acoustic requirements. This paper presents an optimization method for the overall performance of outboard wind turbine airfoils. Based on the complex flow characteristics of the rotor blades and the varying requirements along the span of a blade, the design principles of outboard airfoils were investigated. The requirements for improving the structural performance and reducing the aerodynamic noise were combined with the following aerodynamic design considerations: high efficiency, low extreme loads, stability, and a wide operating region. Thus, this paper proposes a new mathematical model for overall airfoil optimization using the airfoil performance evaluation indicators. Then, an integrated optimization design platform is established for outboard airfoils. Through 2 design cases, new airfoils with desirable aerodynamic characteristics and improved overall performance were obtained.Comparisons between the new airfoils and reference airfoils based on numerical predictions indicate that the proposed method with the newly established mathematical model can effectively balance the complex requirements of the airfoil and improve its overall performance. More notably, the design cases also indicate that the established optimization design method can be used to address special designs of outboard airfoils for different blade requirements. KEYWORDS evaluation parameters, horizontal axis wind turbine, integrated design platform, numerical optimization method, outboard airfoils, overall performance 1 | INTRODUCTION Dedicated airfoils for horizontal axis wind turbines (HAWTs) have evolved over the past several decades and have received increasing attention in recent years because of the increasingly complex aerodynamic and structural requirements of the rotor blades. The airfoil is the profile of the blade cross section, and its performance determines the energy capture performance of the blade. Special airfoils for wind turbines were initially designed in the 1980s. 1 Later, they were intensively developed by the National Renewable Energy Laboratory (NREL), 2 TU Delft, 3 and RISØ, 4 and they have recently nearly replaced traditional aviation airfoils in blade designs. However, with the development of upscaling rotor blades and regional wind farms, the efficient design of special blades operating in different conditions requires advanced airfoils with improved overall performance.Specifically, design methods for improving the overall airfoil performance need to be developed.The early airfoils specially created for wind turbines were designed using the inverse method. 5,6 With the help of subsonic, low Re flow solvers, 7-9 researchers developed some commonly used wind turbine airfoils. However, the inverse design method cannot effectively address the multiobjective design problem. The objectives mainly focused on several aerodynamic force coefficients, such as c l,design or l/d max ...

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“…In practice, a combination of both approaches may be used to better understand and design airfoils for specific working conditions [2]. Once the aforementioned approach is established, a numerical method is commonly employed, taking into account aspects such as: (a) The accurate determination of the physical aspects of the problem, that include whether the flow is compressible or incompressible, viscous or inviscid, subsonic or transonic, among others [1]; (b) The generation of the airfoil geometry, which is often achieved using curve parameterization methods [14] and (c) The discretization and mesh generation methods for numerical resolution, which are essential for obtaining accurate results [6,13].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, when a specific optimal airfoil is required for a particular operating condition, the airfoil design can be formulated as an optimization problem. In this context, optimization algorithms have found extensive use in pure aerodynamic design [6]. Various techniques have been developed using this approach, ranging from single objective function optimization [12] to optimization with multiple (and sometimes conflicting) objective functions, incorporating multiple constraints that need to be simultaneously optimized [10].…”

Section: Introductionmentioning

confidence: 99%

Structural and Shape Optimization in Aerodynamic Airfoil Performance: A Literature Review

Juvinel,

Pinto Roa,

Schaerer

2023

Preprint

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An airfoil is the geometric shape of a cross-section of a wing. When it is exposed to the flow of a fluid over its surface, it generates both lift and drag forces through a pressure distribution. Designing an efficient airfoil for aerodynamic applications is a complex challenge in the field of aerodynamic engineering, with the aim of achieving an optimal lift-to-drag ratio. The success of airfoil design hinges on the effective reduction of drag force under specific conditions, while simultaneously attaining the desired lift without encountering significant flow separation, such as boundary layer shedding. Furthermore, the design must adhere to lifting force limitations and meet structural requirements. In the field of airfoil design and optimization, literature review articles provide a valuable resource by offering an overview of the latest advancements in specific areas. These areas encompass a wide range of topics including the design and testing of adaptive geometry wings, such as morphing wing technology as well as the application of shape optimization techniques to enhance airfoil performance. Our goal is to provide researchers with an in-depth review of relevant articles published to date, examining the applied approaches utilized to tackle the complex problem of airfoil design and explore the methodology employed to address it, from a broad perspective on the topic.

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An improved meshing method for shape optimization of aerodynamic profiles using genetic algorithms

Cited by 10 publications

References 11 publications

Framework for the Shape Optimization of Aerodynamic Profiles Using Genetic Algorithms

Framework for the Shape Optimization of Aerodynamic Profiles Using Genetic Algorithms

Overall design optimization of dedicated outboard airfoils for horizontal axis wind turbine blades

Structural and Shape Optimization in Aerodynamic Airfoil Performance: A Literature Review

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