Multi-objective optimization and fuzzy evaluation of a horizontal axis wind turbine composite blade

2015 ◽  
Vol 7 (6) ◽  
pp. 063109 ◽  
Author(s):  
Qiang Gao ◽  
Xin Cai ◽  
Jie Zhu ◽  
Xingwen Guo
Keyword(s):  
Wind Turbine ◽  
Horizontal Axis ◽  
Fuzzy Evaluation ◽  
Multi Objective Optimization ◽  
Horizontal Axis Wind Turbine ◽  
Multi Objective ◽  
Composite Blade

Multi-Objective Robust Optimization Design of a Fixed-Speed Horizontal Axis Wind Turbine

2013 ◽  
Author(s):  
Weijun Wang ◽  
Stéphane Caro ◽  
Fouad Bennis
Keyword(s):  
Wind Turbine ◽  
Optimization Design ◽  
Optimization Problems ◽  
Horizontal Axis ◽  
Design Environment ◽  
Horizontal Axis Wind Turbine ◽  
Multi Objective ◽  
Design Variables ◽  
Robust Optimization Design ◽  
Environment Parameters

The produced power and the thrust force exerted on the wind turbine are two conflicting objectives in the design of a floating horizontal axis wind turbine. Meanwhile, the variations in design variables and design environment parameters are unavoidable. The variations include the small variations in the design variables due to manufacturing errors, and the large variations in the wind speed. Therefore, two robustness indices are introduced in this paper. The first one characterizes the robustness of multi-objective optimization problems against small variations in the design variables and the design environment parameters. The second robustness index characterizes the robustness of multi-objective optimization problems against large variations in the design environment parameters. The robustness of the solutions based on the two robustness indices is treated as a vector defined in the robustness function space. As a result, the designer can compare the robustness of all Pareto optimal solutions and make a decision. Finally, the multi-objective robust optimization design of a fixed-speed horizontal axis wind turbine illustrates the proposed methodology.

Comparisons of Horizontal-Axis Wind Turbine Wake Interaction Models

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Jordan M. Wilson ◽  
Cole J. Davis ◽  
Subhas K. Venayagamoorthy ◽  
Paul R. Heyliger
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Horizontal Axis ◽  
Navier Stokes ◽  
Turbulent Structures ◽  
Horizontal Axis Wind Turbine ◽  
Composite Blade ◽  
Pressure Distributions ◽  
Wake Interaction ◽  
Computational Fluid Dynamics Cfd

In this study, Reynolds-averaged Navier–Stokes (RANS) simulations are performed using the k-ε and k-ω shear stress transport (SST) turbulence closure schemes to investigate the interactions of horizontal-axis wind turbine (HAWT) models in the neutrally stratified atmospheric boundary layer (ABL). A comparative study of actuator disk, actuator line, and full rotor models of the National Renewable Energy Laboratory (NREL) 5 MW reference turbine is presented. The open-source computational fluid dynamics (CFD) code openfoam 2.1.0 and the commercial software ansysfluent 13.0 are used for simulations. Single turbine models are analyzed for turbulent structures and wake resolution in the downstream region. To investigate the influence of the incident wind field on very large turbine blades, a high-resolution full rotor simulation is carried out for a single turbine to determine blade pressure distributions. Finally, simulations are performed for two inline turbines spaced 5 diameters (5D) apart. The research presented in this study provides an intercomparison of three dominant HAWT models operating at rated conditions in a neutral ABL using an RANS framework. Furthermore, the pressure distributions of the highly resolved full rotor model (FRM) will be useful for future aeroelastic structural analysis of anisotropic composite blade materials.

Withdrawal: Computations of Aerodynamic Behaviour of Small Horizontal Axis Wind Turbine with NACA4418 airfoil

2019 ◽  
Author(s):  
Essam E. Khalil ◽  
Gamal E. ElHarriri ◽  
Eslam E. AbdelGhany ◽  
Moemen E. Farghaly
Keyword(s):  
Wind Turbine ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine
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