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Applied Sciences
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Wind Turbines and Aerodynamics
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Wind Turbines and Aerodynamics

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (10 August 2022) | Viewed by 4281

Special Issue Editor

Prof. Dr. Sebastián Franchini

E-Mail Website
Guest Editor
Instituto Universitario de Microgravedad Ignacio Da Riva, Universidad Politécnica de Madrid, 28040 Madrid, Spain
Interests: aerodynamics; turbulence wind energy; wind engineering; wind turbines; fluid mechanics

Special Issue Information

Dear Colleagues,

Wind energy is a key source of electricity generation for changing the energy model, as it is both cleaner and more sustainable. It is a renewable source that contributes the most to reducing dependence on conventional energies and reducing the impact of the energy sector on the environment.

Energy is obtained by transforming the kinetic energy of the wind into mechanical energy that can be used to generate electricity. Wind turbines are machines designed for this purpose. Therefore, understanding and optimizing the aerodynamics of wind turbines is essential to improve their efficiency and useful life.

This Special Issue aims to reach academics, scientists, and industrial stakeholders interested in the field of wind energy to contribute their achievements to recent advances, especially those related to the aerodynamics of wind turbines.

This present Special Issue covers a wide range of topics, including:

  • Wind rotors, blades, and mast aerodynamics, aeroelastics, aeroacoustics;
  • Wind turbines wakes;
  • Wind rotor and blade design;
  • Performance, optimization, and control.

Prof. Dr. Sebastián Franchini
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • wind turbine aerodynamics
  • wind turbine aeroelasticity
  • aeroacoustics
  • wind engineering
  • renewable energy
  • wind farms and wind plants
  • wind turbine
  • wind rotors and blades
  • wind turbine wakes
  • wind power load simulation
  • aerofoil aerodynamics
  • computational fluid dynamics

Published Papers (2 papers)

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Research

16 pages, 2921 KiB  
Article
Fractional Order Controller Design for Wind Turbines
by Ioana Paducel, Calin Ovidiu Safirescu and Eva-H. Dulf
Appl. Sci. 2022, 12(17), 8400; https://doi.org/10.3390/app12178400 - 23 Aug 2022
Cited by 10 | Viewed by 1547
Abstract
According to recent studies, it has been concluded that renewable electricity generation is being requested to replace all other fuels more often. In China and the USA, among renewable electricity sources, wind usage has increased significantly compared to 2020. Given these circumstances, the [...] Read more.
According to recent studies, it has been concluded that renewable electricity generation is being requested to replace all other fuels more often. In China and the USA, among renewable electricity sources, wind usage has increased significantly compared to 2020. Given these circumstances, the aim of this study was to develop a suitable speed control method for wind power systems in order to achieve maximum power generation while reducing mechanical loads. Several control strategies have been proposed in the literature, all of which offer a compromise between performance and robustness. The present research developed fractional order PID (FOPID) controllers and proved which would be the most suitable controller to address the challenges that wind turbine systems face. The parameters of the FOPID controllers (KP, KI, KD, λ and µ) were tuned with the help of the following optimization algorithms: a genetic algorithm (GA), a multi-objective genetic algorithm (MOGA) and particle swarm optimization (PSO). The results from these three turning methods were then compared to find the method that offered the best performance and system robustness. Full article
(This article belongs to the Special Issue Wind Turbines and Aerodynamics)
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12 pages, 2796 KiB  
Article
Aerodynamic Performance Analysis of a Modified Joukowsky Airfoil: Parametric Control of Trailing Edge Thickness
by Pan Xiong, Lin Wu, Xinyuan Chen, Yingguang Wu and Wenjun Yang
Appl. Sci. 2021, 11(18), 8395; https://doi.org/10.3390/app11188395 - 10 Sep 2021
Cited by 5 | Viewed by 2165
Abstract
In order to ensure the blade strength of large-scale wind turbine, the blunt trailing edge airfoil structure is proposed, aiming at assessing the impact of the trailing edge shape on the flow characteristics and airfoil performance. In this paper, a Joukowsky airfoil is [...] Read more.
In order to ensure the blade strength of large-scale wind turbine, the blunt trailing edge airfoil structure is proposed, aiming at assessing the impact of the trailing edge shape on the flow characteristics and airfoil performance. In this paper, a Joukowsky airfoil is modified by adding the tail thickness parameter K to achieve the purpose of accurately modifying the thickness of the blunt tail edge of the airfoil. Using Ansys Fluent as a tool, a large eddy simulation (LES) model was used to analyze the vortex structure of the airfoil trailing edge. The attack angles were used as variables to analyze the aerodynamic performance of airfoils with different K-values. It was found that when α = 0°, α = 4°, and α = 8°, the lift coefficient and lift–drag ratio increased with increasing K-value. With the increase in the angle of attack from 8° to 12°, the lift–drag ratio of the airfoil with the blunt tail increased from +70% to −7.3% compared with the original airfoil, which shows that the airfoil with the blunt trailing edge has a better aerodynamic performance at a small angle of attack. The aerodynamic characteristics of the airfoil are affected by the periodic shedding of the wake vortex and also have periodic characteristics. By analyzing the vortex structure at the trailing edge, it was found that the value of K can affect the size of the vortex and the position of vortex generation/shedding. When α = 0°, α = 4°, and α = 8°, the blunt trailing edge could improve the aerodynamic performance of the airfoil; when α = 12°, the position of vortex generation changed, which reduced the aerodynamic performance of the airfoil. Therefore, when designing the trailing edge of an airfoil, the thickness of the trailing edge can be designed according to the specific working conditions. It can provide valuable information for the design and optimization of blunt trailing edge airfoil. Full article
(This article belongs to the Special Issue Wind Turbines and Aerodynamics)
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