Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
3.0
2.1
Journals
Machines
Special Issues
Modelling, Design and Optimization of Wind Turbines
share announcement

Modelling, Design and Optimization of Wind Turbines

A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Turbomachinery".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 3396

Special Issue Editors

Dr. Francesco Papi

E-Mail Website
Guest Editor
Department of Industrial Engineering (DIEF), Università degli Studi di Firenze, Via di Santa Marta 3, I-50139 Firenze, Italy
Interests: energy; wind; aerodynamics; aeroelasticity; offshore wind; floating wind
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Mircea Neagoe

E-Mail Website
Guest Editor
Departamentul Design de Produs, Mecatronică și Mediu, Transilvania University of Brasov, Brasov, Romania
Interests: mechanics; mechanisms; machines; renewable energy systems; wind turbines; solar tracking systems; artificial intelligence; product design and development
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, wind energy has risen to be one of the most wide-spread renewable energy sources. As new installations increase, new challenges arise. Modern wind turbines are pushing the envelope in multiple ways: at sea, where floating wind is starting to gain momentum and the ever larger rotors that are being developed are pushing us into uncharted territory in regard to external conditions, aeroelasticity and system dynamics; and on shore, where developers have been dealing with aging wind parks and their repowering.

In this ever-changing landscape, accurate modelling, design and optimization techniques are required to further reduce the cost of wind turbines. Moreover, innovative approaches such as co-design, where the wind turbine and the wind turbine controller are designed and optimized together, still have untapped potential, and can lead to improved wind turbine design both on shore and off shore.

This Special Issue entitled “Modelling, Design and Optimization of Wind Turbines” aims to gather relevant contributions and recent advancements in the fields of wind turbine experimental and numerical modelling practices, as well as in the field of wind turbine design and optimization methods. Topics of interest for this Special Issue include, but are not limited to, the following:

  • Experimental and numerical wind turbine modelling;
  • Wind turbine load and dynamics computation and modelling;
  • Advancements in wind turbine wake numerical and experimental modelling;
  • Advancements in wind turbine design;
  • Advancements in vertical-axis wind turbine design, modelling and optimization;
  • Optimization methods for wind turbines;
  • Co-design of wind turbines;
  • Wind farm design and optimization;
  • Modelling of wind turbine degradation phenomena such as erosion, icing and dirt accretion.

I look forward to receiving your contributions.

Dr. Francesco Papi
Prof. Dr. Mircea Neagoe
Guest Editors

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. Machines is an international peer-reviewed open access monthly 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
  • renewable
  • energy transition
  • experiment
  • simulation
  • optimization
  • design
  • load
  • co-design
  • wake
  • wind farm

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

25 pages, 10672 KiB  
Article
Enhancing Self-Starting Capability and Efficiency of Hybrid Darrieus–Savonius Vertical Axis Wind Turbines with a Dual-Shaft Configuration
by Farzad Ghafoorian, Sina Hosseini Rad and Mahdi Moghimi
Machines 2025, 13(2), 87; https://doi.org/10.3390/machines13020087 - 23 Jan 2025
Cited by 4 | Viewed by 1165
Abstract
Self-starting capability has consistently presented a significant challenge for Darrieus vertical axis wind turbines (VAWTs). One advantageous approach to addressing this problem is the design of a hybrid Darrieus–Savonius VAWT. The hybrid VAWT enhances self-starting capability by increasing the power coefficient ( [...] Read more.
Self-starting capability has consistently presented a significant challenge for Darrieus vertical axis wind turbines (VAWTs). One advantageous approach to addressing this problem is the design of a hybrid Darrieus–Savonius VAWT. The hybrid VAWT enhances self-starting capability by increasing the power coefficient (Cp) within the low tip speed ratio (TSR) range and the torque coefficient (Cm) at initial azimuth angles, when the blades transition from windward to upwind position. A significant challenge associated with conventional hybrid VAWTs, in which both rotors are mounted on a single shaft, is the decline in efficiency at the high-TSR range. This inefficiency is due to the performance limitations of the inner Savonius rotor, which is designed to function at low angular velocities. In the high-TSR range, the vorticity generation around Savonius rotor buckets adversely impacts the Darrieus rotor performance and the hybrid VAWT. A dual-shaft configuration is proposed to mitigate this issue, which utilizes a drivetrain transmission system to prevent the Savonius rotor from exceeding its optimal angular velocity, thus acting as a control mechanism. The findings indicate that implementing the dual-shaft rotor resulted in a 35% improvement in Cp within the low-TSR range and a 25% enhancement in the high-TSR range. This improvement is achieved when the inner rotor’s angular velocity is maintained at 19.79 rad/s, which has been determined to be the optimal value for the inner rotor. Full article
(This article belongs to the Special Issue Modelling, Design and Optimization of Wind Turbines)
►▼ Show Figures

Figure 1

34 pages, 15971 KiB  
Article
Self-Starting Improvement and Performance Enhancement in Darrieus VAWTs Using Auxiliary Blades and Deflectors
by Farzad Ghafoorian, Erfan Enayati, Seyed Reza Mirmotahari and Hui Wan
Machines 2024, 12(11), 806; https://doi.org/10.3390/machines12110806 - 14 Nov 2024
Cited by 7 | Viewed by 1410
Abstract
The Darrieus vertical axis wind turbine (VAWT) is categorized as a lift-based turbomachine. It faces challenges in the low tip speed ratio (TSR) range and requires initial torque for the starting operation. Ongoing efforts are being made to enhance the turbine’s self-starting capability. [...] Read more.
The Darrieus vertical axis wind turbine (VAWT) is categorized as a lift-based turbomachine. It faces challenges in the low tip speed ratio (TSR) range and requires initial torque for the starting operation. Ongoing efforts are being made to enhance the turbine’s self-starting capability. In this study, Computational Fluid Dynamics (CFD) simulations were utilized to tackle the identified challenge. The Unsteady Reynolds-Averaged Navier–Stokes (URANS) approach was employed, combined with the shear–stress transport (SST) k−ω turbulence model, to resolve fluid flow equations. The investigation focused on optimizing the placement of auxiliary blades by considering design parameters such as the pitch angle and horizontal and vertical distances. The goal was to increase the turbine efficiency and initial torque in the low-TSR range while minimizing efficiency loss at high-TSR ranges, which is the primary challenge of auxiliary blade installation. Implementing the auxiliary blade successfully extended the rotor’s operational range, shifting the rotor operation’s onset from TSR 1.4 to 0.7. The optimal configuration for installing the auxiliary blade involves a pitch angle of 0°, a horizontal ratio of 0.52, and a vertical ratio of 0.41. To address the ineffectiveness of auxiliary blades at high-TSRs, installing deflectors in various configurations was explored. Introducing a double deflector can significantly enhance the overall efficiency of the conventional Darrieus VAWT and the optimum rotor with the auxiliary blade by 47% and 73% at TSR = 2.5, respectively. Full article
(This article belongs to the Special Issue Modelling, Design and Optimization of Wind Turbines)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-2
Back to TopTop