A revised theoretical analysis of aerodynamic optimization of horizontal-axis wind turbines based on BEM theory

Pinto, Rafaela da Silveira; Gonçalves, Bruna Patrícia Furtado

doi:10.1016/j.renene.2016.12.076

Cited by 33 publications

(6 citation statements)

References 4 publications

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“…Utsch et al [18] gave a revised study of the aerodynamic optimization of wind turbines considering the drag effect. The analysis was carried out by using blade element momentum theory where the optimization problem was taken as a nonlinear programming problem.…”

Section: Literature Reviewmentioning

confidence: 99%

Wind Blade Twist Correction for Enhanced Annual Energy Production of Wind Turbines

et al. 2021

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Blade geometry is an important design parameter that influences global wind turbine energy harvesting performances. The geometric characteristics of the blade profile are obtained by determining the distribution of the chord and twist angle for each blade section. In order to maximize the wind energy production, implying a maximum lift-to-drag ratio for each wind speed, this distribution should be optimized. This paper presents a methodology to numerically determine the change in the twist angle by introducing a range of pitch angles for the maximum power coefficient case. The obtained pitch values were distributed from the root to the tip of blade. The results prove that the power coefficient increases for wind speeds greater than the rated point, which improves the yearly production of energy by 5% compared to the reference case.

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Section: Literature Reviewmentioning

confidence: 99%

Wind Blade Twist Correction for Enhanced Annual Energy Production of Wind Turbines

et al. 2021

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“…In these works, while the focus of the research is on topology/shape optimisation of the blade, researchers have adopted different approaches in terms of the method of optimisation and the type of the blade. For example, recent publications [1][2][3][4][5][6][7][8][9][10][11][12][13] deal with conventional blades, papers [14 and 15] are about aerodynamic design optimisation of nonconventional blades, and the reported work [16] deals with the blades equipped with active flow controllers. In the structural design phase, the internal structure and the material of the blade are selected and designed.…”

Section: Introductionmentioning

confidence: 99%

“…Here, the fixed parameters are those which define the topology of the blade as well as the total 563 number of patches, the location of all patches with balanced layups, the layup configuration of all 564 balanced patches, and the stacking sequence and the total number of unidirectional layers in the 565 unbalanced patches (10)(11)(12)(13)(31)(32)(33)(34). Size of the unbalanced patches is to be determined through 566 optimisation.…”

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confidence: 99%

Multiobjective optimisation and integrated design of wind turbine blades using WTBM-ANSYS for high fidelity structural analysis

Maheri

2020

Renewable Energy

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Multiobjective optimisation and integrated aerodynamic-structural design of wind turbine blades are emerging approaches, both requiring significant number of high fidelity analyses. Designer-in-theloop blade modelling and pre/ post-processing using specialised software is the bottleneck of high fidelity analysis and therefore a major obstacle in performing a robust optimisation, where thousands of high fidelity analyses are required to find the optimum solution. Removing this bottleneck is the driver for the development of WTBM, an automated wind turbine blade modeller. WTBM takes parameters defining the blade and its operating condition as inputs and generates preprocessor, solver and post-processor APDL files required by ANSYS for high fidelity analysis. The inputs can be generated automatically within an optimisation process, hence so can be the APDL files, allowing a fully automated optimisation in which any of the parameters which are required to define the size, topology, structure and material of a blade to be treated as a design variable. The solver parameters will be also updated automatically as necessary. The performance of WTBM-ANSYS in conducting hundreds of automated high fidelity analyses within an optimisation process is shown through multiobjective structural design and multiobjective integrated design case studies.

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“…Liu [14] studied the effect of the aerodynamic load and its interaction with the structure under uniformly distributed wind flow conditions, determining an expression for the wind force per unit based on both average and fluctuating wind speed. Additionally, researchers have used both blade element momentum (BEM) theory and actuator disk theory in the development of aeroelastic models [15] to [17]. Moreover, Akbiyik et al [18] evaluated an air foil in a wind tunnel with a test section of 570 mm × 570 mm × 1000 mm, measuring and monitoring the response signal using an oscilloscope.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Instability of a Wind Turbine Blade Due to Large Deflections: An Experimental Validation

Lopez-Lopez

Robles-Ocampo

Sevilla-Camacho

et al. 2020

SV-JME

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Wind turbine blades are designed to be thin and flexible elements. Because unstable dynamic behaviour can affect the life of the rotor, it is crucial to understand the instability of non-linear behaviour caused by large deflections. The present study undertakes both a stability analysis of the non-linear response and an experimental validation of a simplified model for a wind turbine blade based on a cantilever beam. The model is formulated taking into account large geometric deflections and assuming a Galerkin approach. The model is validated experimentally in a wind tunnel with aluminium beams of differing geometry. Analysis of the dynamic response using phase planes reveals that the degree of instability is related to the amplitude of the excitation and the stiffness characteristics.

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A revised theoretical analysis of aerodynamic optimization of horizontal-axis wind turbines based on BEM theory

Cited by 33 publications

References 4 publications

Wind Blade Twist Correction for Enhanced Annual Energy Production of Wind Turbines

Wind Blade Twist Correction for Enhanced Annual Energy Production of Wind Turbines

Multiobjective optimisation and integrated design of wind turbine blades using WTBM-ANSYS for high fidelity structural analysis

Dynamic Instability of a Wind Turbine Blade Due to Large Deflections: An Experimental Validation

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