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Energies
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Innovation in Wind Turbine Blade Design and Aeroelasticity
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Innovation in Wind Turbine Blade Design and Aeroelasticity

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A3: Wind, Wave and Tidal Energy".

Deadline for manuscript submissions: closed (29 June 2022) | Viewed by 11299
Please submit your paper and select the Journal "Energies" and the Special Issue "Innovation in Wind Turbine Blade Design and Aeroelasticity" via: https://susy.mdpi.com/user/manuscripts/upload?journal=energies. Please contact the journal editor Adele Min ([email protected]) before submitting.

Special Issue Editor

Prof. Dr. Taeseong Kim

E-Mail Website
Guest Editor
Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough LE11 3TU, UK
Interests: innovative blade design; design optimization; aeroelasticity; reduced order model; blade design with environmental impacts; HAWT; VAWT

Special Issue Information

Dear Colleagues,

The Guest Editor is inviting submissions for a Special Issue of Energies, “Innovation in Wind Turbine Blade Design and Aeroelasticity”. The size of wind turbines is getting larger. The world’s largest wind turbine, GE Haliade-X12, has a 107 m long blade. Wind turbine blades are more flexible and slender, which introduces complicated dynamic behaviors during operations and standstill. Recently, low wind speed/low induction wind turbines have been investigated, as well as very flexible down-wind-type wind turbine rotors. This requires innovative rotor design, including active and passive control to reduce fatigue and extreme loads. The multidisciplinary design optimization approach is widely studied, where various design variables such as aerodynamic design, structural design, controller design, load analysis, stability analysis, etc., should be considered during the design process. Furthermore, aeroelastic investigation for such a large and/or innovative wind turbine system is getting more important and challenged.

This Special Issue aims to discuss a set of new innovative blade designs, design methods, and its aeroelastic responses for both HAWT and VAWT.

Topics will broadly include but are not limited to:

  • Innovative blade designs;
  • State-of-the-art blade design process;
  • Wind turbine aeroelasticity;
  • Numerical design method/tool development for blade design/analysis such as nonlinear ROM, modal approach including torsional degree of freedom, a new beam model, etc.;
  • Wind turbine blade design considering environmental impacts such as blade icing in cold climates, blade erosion, noise mitigation, etc.

Prof. Dr. Taeseong Kim
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. Energies 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 2600 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.

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Published Papers (3 papers)

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Research

19 pages, 499 KiB  
Article
Post-Optimum Sensitivity Analysis with Automatically Tuned Numerical Gradients Applied to Swept Wind Turbine Blades
by Michael K. McWilliam, Antariksh C. Dicholkar, Frederik Zahle and Taeseong Kim
Energies 2022, 15(9), 2998; https://doi.org/10.3390/en15092998 - 20 Apr 2022
Cited by 5 | Viewed by 1395
Abstract
Post-Optimum Sensitivity Analysis (POSA) extends numerical design optimization to provide additional information on how the design and performance would change if various parameters and constraints were varied. POSA is challenging since it typically requires accurate gradients and gradient-based optimization problems that provide Lagrange [...] Read more.
Post-Optimum Sensitivity Analysis (POSA) extends numerical design optimization to provide additional information on how the design and performance would change if various parameters and constraints were varied. POSA is challenging since it typically requires accurate gradients and gradient-based optimization problems that provide Lagrange multipliers. To overcome this problem, this paper introduces a technique to automatically tune gradients with statistical methods and algorithms to calculate the Lagrange multipliers after an optimization. This allows these methods to be applied to problems with noisy gradients or problems solved with gradient-free optimization algorithms. These methods have been applied to swept wind turbine blades. Swept blades can reduce wind turbine loads by twisting out of the wind when the wind speed increases. The methods have shown that introducing design freedom in the sweep, blade root flap-wise bending moments and blade tip deflection has a weaker influence on the design. Instead, blade root torsion moment and material failure become the driving constraints. Full article
(This article belongs to the Special Issue Innovation in Wind Turbine Blade Design and Aeroelasticity)
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15 pages, 4861 KiB  
Article
Simulation and Experimental Study on the Ultrasonic Micro-Vibration De-Icing Method for Wind Turbine Blades
by Yan Li, He Shen and Wenfeng Guo
Energies 2021, 14(24), 8246; https://doi.org/10.3390/en14248246 - 8 Dec 2021
Cited by 12 | Viewed by 3113
Abstract
In cold and humid regions, ice accretion sometimes develops on the blades of wind turbines. Blade icing reduces the power generation of the wind turbine and affects the safe operation of the wind farm. For this paper, ultrasonic micro-vibration was researched as an [...] Read more.
In cold and humid regions, ice accretion sometimes develops on the blades of wind turbines. Blade icing reduces the power generation of the wind turbine and affects the safe operation of the wind farm. For this paper, ultrasonic micro-vibration was researched as an effective de-icing method to remove ice from the wind turbine blade surface and improve the efficiency of wind turbine power generation. A blade segment with NACA0018 airfoil and the hollow structure at the leading edge was designed. The modal analysis of the blade was simulated by ANSYS, and the de-icing vibration mode was selected. Based on the simulation results, the blade segment sample with PZT patches was machined, and its natural frequencies were measured with an impedance analyzer. A return-flow icing wind tunnel system, and a device used to measure the adhesive strength of ice covering the airfoil blade, were designed and manufactured. The experiments on the adhesive strength of the ice were carried out under the excitation of the ultrasonic vibration. The experimental results show that the adhesive strength of the ice, which was generated under the dynamic flow field condition, was lower than the ice generated by water under the static flow field condition. Under the excitation of the ultrasonic vibration, the adhesive strength of the ice decreased. When the excitation frequency was 21.228 kHz, the adhesive strength was the lowest, which was 0.084 MPa. These research findings lay the theoretical and experimental foundations for researching in-depth the application of the ultrasonic de-icing technology to wind turbines. Full article
(This article belongs to the Special Issue Innovation in Wind Turbine Blade Design and Aeroelasticity)
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18 pages, 12206 KiB  
Article
Structural Design, Analysis, and Testing of a 10 kW Fabric-Covered Wind Turbine Blade
by Dong-Kuk Choi, Bong-Do Pyeon, Soo-Yong Lee, Hak-Gu Lee and Jae-Sung Bae
Energies 2020, 13(12), 3276; https://doi.org/10.3390/en13123276 - 24 Jun 2020
Cited by 5 | Viewed by 5114
Abstract
Reducing the weight of a wind turbine blade is a major issue. Wind turbines have become larger in size to increase power generating efficiency. The blade has also grown in length to take more wind energy. A fabric-based wind turbine blade, introduced by [...] Read more.
Reducing the weight of a wind turbine blade is a major issue. Wind turbines have become larger in size to increase power generating efficiency. The blade has also grown in length to take more wind energy. A fabric-based wind turbine blade, introduced by General Electric Co., reduced the blade weight. In this study, a small fabric-covered blade for a 10 kW wind turbine was developed to verify structural ability. The blade was designed on the cross-section using variational asymptotic beam sectional analysis (VABS), structural analysis was carried out using MSC.Nastran for the design loads. A modal analysis was performed to compare the modal frequency and mode shapes. Static structural testing and modal testing were fulfilled. The analysis results were compared with the testing results. The fabric-covered structure was confirmed to reduce the blade mass with sufficient strength. Full article
(This article belongs to the Special Issue Innovation in Wind Turbine Blade Design and Aeroelasticity)
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