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High Utilization of Computational Fluid Dynamics and Turbomachinery in Renewable Energy System

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A: Sustainable Energy".

Deadline for manuscript submissions: closed (15 November 2024) | Viewed by 2605

Special Issue Editors

Prof. Dr. Zhengwei Wang

E-Mail Website
Guest Editor
State Key Laboratory of Hydro Science and Engineering & Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
Interests: hydropower; hydraulic machinery; tidal energy; energy storage; multiphysics coupling investigation
Special Issues, Collections and Topics in MDPI journals
Dr. Xingxing Huang

E-Mail Website
Guest Editor
S.C.I. Energy, Future Energy Research Institute, 8706 Zurich, Switzerland
Interests: renewable energy; industrial digitalization and digital solutions; time-series modeling; scientific computing
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Xavier Escaler

E-Mail Website
Guest Editor
Department of Fluid Mechanics, Universitat Politècnica de Catalunya, 08034 Barcelona, Spain
Interests: digital sensing; condition monitoring; computational fluid dynamics; fluid machinery
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In order to address the global energy crisis and mitigate environmental pollution, countries around the world are establishing a sustainable future by prioritizing the deployment of renewable energy sources, enhancing energy efficiency and implementing supportive policies that minimize carbon emissions and maximize energy resilience. Renewable energy systems, which utilize natural resources such as sunlight, wind, water and geothermal heat, offer a viable solution to the energy crisis by providing clean, reliable and sustainable alternatives to fossil fuels.

Computational Fluid Dynamics (CFD) has become a powerful tool and is now extensively utilized in the design, analysis and optimization of turbomachinery in renewable energy systems. It is also widely employed in the research and development of high-performance and efficient turbomachinery across various industrial sectors. In addition, academia, industry and the government are currently collaborating in order to accelerate knowledge sharing and technological innovation in this area.

 We are honored to invite you to share your research on the application of turbomachinery in renewable energy systems. The scope of this Special Issue includes, but is not limited to, the following topics:

  • Measurement and simulation;
  • Flow analysis and visualization;
  • Performance prediction;
  • Component design and optimization;
  • Steady-state and transient analysis;
  • Cavitation, erosion and multi-phase flow analysis;
  • Heat transfer and thermal analysis:
  • Noise and vibration analysis;
  • Multiphysics simulation;
  • Cavitation model application and development
  • Erosion model application and development
  • Turbulence model application and development (RANS, LES, DES, SRS, DNS, etc.)
  • Multiphysics coupling
  • Machine learning and AI
  • Industrial digitalization and digital twin

Prof. Dr. Zhengwei Wang
Dr. Xingxing Huang
Dr. Xavier Escaler
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. 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.

Keywords

  • renewable energy systems
  • geothermal energy
  • hydropower
  • marine energy
  • wave energy
  • wind energy
  • solar energy
  • tidal energy
  • energy storage
  • wind farm layout
  • turbomachinery
  • wind turbines
  • compressor
  • turbocharger
  • fans
  • turbine
  • pumps
  • pump-turbines
  • propeller
  • motor
  • generator
  • exciter

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Published Papers (2 papers)

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Research

36 pages, 21118 KiB  
Article
Flow Separation Control and Aeroacoustic Effects of a Leading-Edge Slat over a Wind Turbine Blade
by Sami Bouterra, Riyadh Belamadi, Abdelouaheb Djemili and Adrian Ilinca
Energies 2024, 17(22), 5597; https://doi.org/10.3390/en17225597 - 9 Nov 2024
Viewed by 484
Abstract
To enable wind energy to surpass fossil fuels, the power-to-cost ratio of wind turbines must be competitive. Increasing installation capacities and wind turbine sizes indicates a strong trend toward clean energy. However, larger rotor diameters, reaching up to 170 m, introduce stability and [...] Read more.
To enable wind energy to surpass fossil fuels, the power-to-cost ratio of wind turbines must be competitive. Increasing installation capacities and wind turbine sizes indicates a strong trend toward clean energy. However, larger rotor diameters, reaching up to 170 m, introduce stability and aeroelasticity concerns and aerodynamic phenomena that cause noise disturbances. These issues hinder performance enhancement and social acceptance of wind turbines. A critical aerodynamic challenge is flow separation on the blade’s suction side, leading to a loss of lift and increased drag, ultimately stalling the blade and reducing turbine performance. Various active and passive flow control techniques have been studied to address these issues, with passive techniques offering the advantage of no external energy requirement. High-lift devices, such as leading-edge slats, are promising in improving aerodynamic performance by controlling flow separation. This study explores the geometric parameters of slats and their effects on wind turbine blades’ aerodynamic and acoustic performance. Using an adequate turbulence model at Re = 106 for angles of attack from 14° to 24°, 77 slat configurations were evaluated. Symmetric slats showed superior performance at high angles of attack, while slat chord length was inversely proportional to aerodynamic improvement. A hybrid method was employed to predict noise, revealing slat-induced modifications in eddy topology and increased low- and high-frequency noise. This study’s main contribution is correlating slat-induced aerodynamic improvements with their acoustic effects. The directivity reveals a 10–15 dB reduction induced by the slat at 1 kHz, while the slat induces higher noise at higher frequencies. Full article
(This article belongs to the Special Issue High Utilization of Computational Fluid Dynamics and Turbomachinery in Renewable Energy System)
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13 pages, 16801 KiB  
Article
Experimental Erosion Flow Pattern Study of Pelton Runner Buckets Using a Non-Recirculating Test Rig
by Baig Mirza Umar, Zhengwei Wang, Sailesh Chitrakar, Bhola Thapa, Xingxing Huang, Ravi Poudel and Aaditya Karna
Energies 2024, 17(16), 4006; https://doi.org/10.3390/en17164006 - 13 Aug 2024
Viewed by 1578
Abstract
Sediment erosion of hydraulic turbines is a significant challenge in hydropower plants in mountainous regions like the European Alps, the Andes, and the Himalayan region. The erosive wear of Pelton runner buckets is influenced by a variety of factors, including the size, hardness, [...] Read more.
Sediment erosion of hydraulic turbines is a significant challenge in hydropower plants in mountainous regions like the European Alps, the Andes, and the Himalayan region. The erosive wear of Pelton runner buckets is influenced by a variety of factors, including the size, hardness, and concentration of silt particles; the velocity of the flow and impingement angle of the jet; the properties of the base material; and the operating hours of the turbine. This research aims to identify the locations most susceptible to erosion and to elucidate the mechanisms of erosion propagation in two distinct designs of Pelton runner buckets. The Pelton runner buckets were subjected to static condition tests with particle sizes of 500 microns and a concentration of 14,000 mg/L. The buckets were coated with four layers of paint, sequentially applied in red, yellow, green, and blue. The two Pelton buckets, D1 and D2, were evaluated for their erosion resistance properties. D2 demonstrated superior erosion resistance, attributed to its geometrical features and material composition, lower erosion rates, less material loss, and improved surface integrity compared with D1. This difference is primarily attributed to factors such as the splitter’s thickness, the jet’s impact angle, the velocity at which particles strike, and the concentration of sand. D2 exhibits a great performance in terms of erosion resistance among the two designs. This study reveals that the angle of jet impingement influences erosion progression and material loss, which is important to consider during a Pelton turbine’s design and operating conditions. Full article
(This article belongs to the Special Issue High Utilization of Computational Fluid Dynamics and Turbomachinery in Renewable Energy System)
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