Results 61 to 70 of about 3,381 (154)
International Journal of Renewable Energy Development, 2018 Flows through a vertical axis wind turbine (VAWT) are very complex due to their inherent unsteadiness caused by large variations of the angle of attacks as the turbine is rotating and changing its azimuth angles simultaneously.
Jaruwan Chaiyanupong, Tawit Chitsomboon
doaj +1 more source
Performance Improvement of Hybrid Vertical Axis Wind Turbines Equipped With J‐Shaped Blades
Energy Science &Engineering, Volume 13, Issue 9, Page 4433-4444, September 2025.This study presents a novel hybrid vertical axis wind turbine, utilizing J‐shaped blades in Darrieus rotor. The proposed configuration shows the potential of J‐shaped blades in improving the overall performance of hybrid rotors. ABSTRACT Vertical axis wind turbines (VAWTs) are emerging as a promising solution for urban wind energy harvesting, owing to ...
Narges Kashani +3 more
wiley +1 more source
Effects of blade section on performance of butterfly wind turbines as double-blade VAWTs
Journal of Fluid Science and Technology, 2015 A butterfly wind turbine (BWT) is a kind of vertical axis wind turbine (VAWT) with closed-loop blades. These blades form a double-blade structure, which is expected to improve self-starting properties and reduce energy costs because of their simple ...
Yutaka HARA +6 more
doaj +1 more source
Wind Energy, Volume 28, Issue 8, August 2025.ABSTRACT The conventional Savonius wind turbine's power coefficient is comparatively low, which limits its efficiency. Because the power coefficient depends significantly on the blade design, this study investigates the potential of improving the turbine performance by modifying the rotor blade designs.
Shihab Shahriare +2 more
wiley +1 more source
Wind Energy, Volume 28, Issue 8, August 2025.ABSTRACT Wind energy is the most mature renewable energy technology; however, its exploitation in cities is often met with skepticism. Thanks to their ability to operate at low wind speed regardless of direction, vertical axis wind turbines (VAWTs) offer an attractive opportunity for wind energy harvesting in cities. However, limited evidence exists on
Aldo Brandi, Gabriele Manoli
wiley +1 more source
Multi‐Rotor Systems: Can They Increase Economy‐Wide Benefits Compared to Traditional Designs?
Wind Energy, Volume 28, Issue 8, August 2025.ABSTRACT This short communication reports on the economic consequences of increasing the market share of potentially lower‐cost offshore wind designs. We use data on the projected levelised cost of energy (LCOE) for traditional horizontal axis wind turbine (HAWT) designs compared with an illustrative multi‐rotor system which could have lower costs ...
Jack Williamson +2 more
wiley +1 more source
Optimizing H-Darrieus Wind Turbine Performance with Double-Deflector Design
EnergiesThis study aims to improve an H-Darrieus vertical-axis wind turbine (VAWT) by imposing a novel double-deflector design. A computational fluid dynamics (CFD) model was implemented to examine the aerodynamic characteristics of the VAWT with double ...
Wei-Hsin Chen +5 more
doaj +1 more source
Energy Science &Engineering, Volume 13, Issue 6, Page 3171-3184, June 2025.This study introduces an innovative dual‐row vertical axis wind turbine with hybrid blades, integrating J‐shaped and conventional blades to enhance overall performance. Using computational fluid dynamics simulations and Taguchi optimization, the turbine achieved a power coefficient of 0.52 under optimal conditions, significantly outperforming ...
H. Mirzaeian +2 more
wiley +1 more source
Optimal Design of a Micro Vertical Axis Wind Turbine for Sustainable Urban Environment [PDF]
The need for sustainable energy sources becomes greater each year due to the continued depletion of fossil fuels and the resulting energy crisis. Solutions to this problem are potentially in the form of wind turbines, for sustainable urban environment ...
Park, Kyooseon
core +3 more sources
Journal of Fluid Science and Technology, 2015 This paper presents a numerical simulation and experiment on the effect of the variable pitch angle on the performance of a small vertical-axis wind turbine (VAWT) with straight blades.
Rachmat FIRDAUS +3 more
doaj +1 more source