A multi-objective optimization for HAWT blades design by considering structural strength

Yang, Yang; Li, Chun; Zhang, Wanfu; Yang, Jun; Zhou, Ye; Miao, Weiwei; Kehua, Ye

doi:10.1007/s12206-016-0731-3

Cited by 17 publications

(6 citation statements)

References 14 publications

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“…BEMT is a combination of momentum theory and blade element theory. It is an iterative process to compute the relative wind velocity induced at the rotor, axial, and tangential induction factors to determine the chord length with a defined TSR [17]. The model divides the blade into several sections from the root to the tip of the blade to determine the aerodynamic forces on each element.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and computational studies on the optimal positions of NACA airfoils used in horizontal axis wind turbine blades

Aklilu¹,

Bright

Adali³

2022

Journal of Energy Systems

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This paper presents a theoretical and computational study to determine the optimal positions of airfoils along the length of the horizontal axis wind turbine blade. We used four and five-digit NACA airfoils to model a 54-meter blade. The lift, drag coefficient, and lift-to-drag ratio of each airfoil are determined by using QBlade software. The aerodynamic performance of the airfoils is studied based on the blade element momentum theory, and Matlab software is used for numerical implementation. The velocity and pressure distributions on each airfoil are assessed using computational fluid dynamics. We implement the thickness distribution techniques to adjust the positions of the airfoils along the length of the blade. It is noted that stresses reach their maximum values at the root and minimum at the tip section. Thus, the thicker (NACA 4420) and thinner (NACA 23012) airfoils are set at 20% of the maximum chord and 91.11% at the tip sections of the blades. The remaining sections of the blade are configured using linear interpolation methods. Specifically, the maximum chord length of the new design is reduced by 18.06% compared to the NACA 23012 rotor blade. Finally, the recommended tip speed ratio for the designed rotor blade is estimated using the graphs of the normal and tangential forces, thereby producing a safe and efficient design.

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Section: Introductionmentioning

confidence: 99%

Theoretical and computational studies on the optimal positions of NACA airfoils used in horizontal axis wind turbine blades

Aklilu¹,

Bright

Adali³

2022

Journal of Energy Systems

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“…(3) and Eq. (4)[35]. dM are, respectively, the thrust and moment of the local blade element; ρ is the density of the inflow fluid; l C and d C are, respectively, the lift and drag coefficients of the sectional aerofoil; The Beddoes-Leishman dynamic stall model is used to correct the aerodynamic coefficients under unsteady conditions; c is the chord length of the blade element;…”

mentioning

confidence: 99%

Performance evaluation of an integrated floating energy system based on coupled analysis

Yang

Bashir

Wang

et al. 2020

Energy Conversion and Management

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An integrated floating energy system consisting of different types of energy devices is an ideal option for reducing the levelized cost of energy by enhancing the power production capacity. This study proposes a concept of an integrated energy system by combining two tidal turbines with a floating wind turbine. In order to investigate the power performance and dynamic responses of the hybrid concept, a novel coupled aero-hydro-servo-elastic tool is developed based on a commercial hydrodynamic analysis software package. In addition, a torque-pitch controller and the AeroDyn module are integrated within the coupled tool for evaluating the power performance of the tidal turbines under dynamic inflow conditions. Experimental data and numerical results obtained by OpenFAST are used to verify the accuracy of the coupled tool in predicting dynamic responses of the integrated energy system. The dynamic responses and power production under different environmental conditions are obtained by conducting a series of simulations. The results indicate that the total power production is increased by 3.84% to 6.46%. The transient behavior of the platform is improved and the tension fluctuation in mooring lines are significantly reduced by the hydrodynamic damping provided by the tidal turbines. In addition, the tidal turbines have no negative influences on the aero-elastic responses and power performance of the wind energy system.The results have demonstrated the advantages of the integrated energy system in enhancing the power production and improving the dynamic performance.

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“…In order to achieve the aerodynamic equivalence in the entire region between the cut-in and cut-out wind speeds, an innovative aerodynamic equivalent design methodology is proposed in this study, based on the genetic algorithm (GA). Based on previous investigations, the GA was extensively adopted for the performance optimization of wind turbines under the prototype scale to improve the power efficiency or reduce the structural mass and loads, which was validated to be effective [20][21][22]. In this paper, the scaling laws of wind tunnel real-time hybrid model tests and the aerodynamic equivalent design methodology are first introduced in Sections 2 and 3.…”

Section: Introductionmentioning

confidence: 99%

Design Methodology of Wind Turbine Rotor Models Based on Aerodynamic Thrust and Torque Equivalence

Ma,

Chen,

Yin

et al. 2023

JMSE

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Limited by scaling effects, the physical model tests of FOWTs (floating offshore wind turbines) cannot simulate the aerodynamic loads on rotors correctly. To solve this problem, the real-time hybrid model tests in wind tunnels were developed and provided a feasible solution for the aerodynamic simulation. To perform the wind tunnel tests, the design of aerodynamic equivalent rotor models is most critical. In this study, an innovative methodology of aerodynamic equivalent design for the wind turbine rotors is developed based on GA (genetic algorithm). The NREL (National Renewable Energy Laboratory) 5 MW and DTU (Technical University of Denmark) 10 MW rotors are employed for the case studies to validate the proposed methodology. According to the results, the model-scale aerodynamic thrust performance can be accurately matched with the prototype in the entire region between cut-in and cut-out wind speeds, which allows the rotor model to provide correct thrust at different wind speeds. The variance of the aerodynamic torque with the wind speeds for the developed model is also in good agreement with the prototype, which could be beneficial for the design of the model-scale active pitch control strategy. Moreover, the applicability of the fitness functions of GA is discussed.

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A multi-objective optimization for HAWT blades design by considering structural strength

Cited by 17 publications

References 14 publications

Theoretical and computational studies on the optimal positions of NACA airfoils used in horizontal axis wind turbine blades

Theoretical and computational studies on the optimal positions of NACA airfoils used in horizontal axis wind turbine blades

Performance evaluation of an integrated floating energy system based on coupled analysis

Design Methodology of Wind Turbine Rotor Models Based on Aerodynamic Thrust and Torque Equivalence

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