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Journal articles on the topic 'VAWT'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Tong, Minhui, Weidong Zhu, Xiang Zhao, Meilin Yu, Kan Liu, and Gang Li. "Free and Forced Vibration Analysis of H-type and Hybrid Vertical-Axis Wind Turbines." Energies 13, no. 24 (2020): 6747. http://dx.doi.org/10.3390/en13246747.

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Vertical-axis wind turbines (VAWTs) are compact and efficient and have become increasingly popular for wind energy harvesting. This paper mainly focuses on free and forced vibration analysis of two different types of VAWTs, i.e., an H-type VAWT and a new hybrid VAWT. The H-type VAWT has a lower cost, while the hybrid VAWT has a better self-starting capability at a low wind velocity. Both of them can be used for wind energy harvesting. By using the assumed modes method, the two VAWTs are simplified by a single degree-of-freedom (SDOF) model. By utilizing the method of structural mechanics, a mu

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2

Asim, Taimoor, Dharminder Singh, M. Salman Siddiqui, and Don McGlinchey. "Effect of Stator Blades on the Startup Dynamics of a Vertical Axis Wind Turbine." Energies 15, no. 21 (2022): 8135. http://dx.doi.org/10.3390/en15218135.

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Vertical Axis Wind Turbines (VAWTs) are omni-directional, low-cost, low-efficiency wind power extractors. A conventional drag-based VAWT consists of multiple thin rotor blades with a typical peak Tip Speed Ratio (λ) of < 1. Their lower cut-in speed and maintenance cost make them ideal for power generation in urban environments. Numerous studies have been carried out analysing steady operation of VAWTs and quantifying their performance characteristics, however, minimal attention has been paid to their start-up dynamics. There are a few recent studies in which start-up dynamics of lift-based

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3

Mohammed, Gwani, Mamuda Buhari, Umar Muhammed Kangiwa, and John Danyaro. "Design, Fabrication and Performance Evaluation of Hybrid Vertical Axis Wind Turbine." International Journal for Modern Trends in Science and Technology 6, no. 6 (2020): 80–86. http://dx.doi.org/10.46501/ijmtst060618.

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Vertical axis wind turbines (VAWT) have attracted a lot of attention recently as an efficient tool in harnessing wind energy; however these types of wind turbine are faced with some challenges which affect their overall performance. The Darrieus rotor has difficulty to self-start by itself while the Savonius rotor has low efficiency. The performance of these turbines can be improved by combining the two VAWTs as one system. This paper presents the design of a hybrid VAWTs turbine. The Hybrid VAWTs combines the Darrieus rotor and the Savonius rotor as a single system to produce a high starting

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4

Brunner, C. E., J. Kiefer, and M. Hultmark. "Comparison of dynamic stall on an airfoil undergoing sinusoidal and VAWT-shaped pitch motions." Journal of Physics: Conference Series 2265, no. 3 (2022): 032006. http://dx.doi.org/10.1088/1742-6596/2265/3/032006.

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Abstract The aerodynamics of vertical axis wind turbines (VAWTs) are inherently unsteady because the blades experience large angle of attack variations throughout a full turbine revolution. At low tip speed ratios, this can lead to a phenomenon known as dynamic stall. To better characterise the unsteady aerodynamics and represent them in models and simulations, data from studies of individual static or pitching airfoils are often applied to VAWT blades. However, these studies often involve sinusoidally pitching airfoils, whereas the pitching motions experienced by VAWTs are more complex. Here,

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5

Nofirman Firdaus, Bambang Teguh Prasetyo, Hasnida Ab-Samat, et al. "Wind Energy Potential on A Highrise Building: A Preliminary Study." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 88, no. 3 (2021): 20–30. http://dx.doi.org/10.37934/arfmts.88.3.2030.

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Indonesia has an abundant renewable energy source. One of them is wind energy resources. Unfortunately, Indonesia's wind energy resource is not fully utilized, especially for application in high-rise buildings. The paper investigates the potential of energy production from the horizontal-axis wind turbine (HAWT) and the vertical-axis wind turbine (VAWT) on the rooftop of a university building in Indonesia. The wind speed data were measured on the rooftop of the building for seven months. The data was analyzed using Weibull distribution. Based on the probability density function of the Weibull

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6

Mohan Kumar, Palanisamy, Krishnamoorthi Sivalingam, Teik-Cheng Lim, Seeram Ramakrishna, and He Wei. "Review on the Evolution of Darrieus Vertical Axis Wind Turbine: Large Wind Turbines." Clean Technologies 1, no. 1 (2019): 205–23. http://dx.doi.org/10.3390/cleantechnol1010014.

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The objective of the current review is to present the development of a large vertical axis wind turbine (VAWT) since its naissance to its current applications. The turbines are critically reviewed in terms of performance, blade configuration, tower design, and mode of failure. The early VAWTs mostly failed due to metal fatigue since the composites were not developed. Revisiting those configurations could yield insight into the future development of VAWT. The challenges faced by horizontal axis wind turbine (HAWT), especially in the megawatt capacity, renewed interest in large scale VAWT. VAWT

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7

MacPhee, David, and Asfaw Beyene. "Recent Advances in Rotor Design of Vertical Axis Wind Turbines." Wind Engineering 36, no. 6 (2012): 647–65. http://dx.doi.org/10.1260/0309-524x.36.6.647.

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The following work represents the most recent advances in design and testing of vertical axis wind turbines (VAWT) rotors. VAWTs have received much attention as of late due to proposed advantages in small scale and off grid wind power generation. Thus, many recent works have surfaced involving analysis, design and optimization of VAWT rotors in order to more efficiently convert wind energy to electricity or other readily usable means. This paper is a collection of most of the recent literature works involving VAWT rotor design and testing, the majority of which published after 2005. We discuss

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8

Wang, Qi Kun. "Numerical Investigation on Aerodynamic Performance for Guiding VAWT with Combined Blades." Applied Mechanics and Materials 34-35 (October 2010): 376–82. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.376.

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In this paper, the reason was analyzed that the aerodynamic efficiency of the traditional vertical axis wind turbine (VAWT) was always low, and a new type of VAWT—Guiding VAWT was introduced. On that basis, a new blade shape called as combined blade for Guiding VAWT was proposed and numerical investigation was complemented on its aerodynamic performance by CFD (Computational Fluid Dynamics) technique. This Guiding VAWT includes two components: guiding impeller and rotating impeller, which are both combined blade in shape. The guiding blade is combined by three sections: inlet radial section, m

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9

Korprasertsak, Natapol, and Thananchai Leephakpreeda. "Optimal Design of Wind Boosters for Low Speed Vertical Axis Wind Turbines." Applied Mechanics and Materials 798 (October 2015): 195–99. http://dx.doi.org/10.4028/www.scientific.net/amm.798.195.

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Although Vertical Axis Wind Turbines (VAWTs) are designed for performing mechanical works acceptably at medium wind speed, Standalone VAWTs are still unable to generate mechanical power satisfactorily for best practice at low speed wind. This study presents optimal design of wind booster, by utilizing Computational Fluid Dynamics (CFD). A wind booster is proposed to be implemented with a VAWT in order to not only harvest energy with low availability at low wind speed but also enhance performance of a VAWT at higher wind speed. In CFD-based experiments, guiding and throttling effects of the win

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10

Tan Chun Khai, Ahmad Faiz Mohammad, Ahmad Fazlizan, Sheikh Ahmad Zaki, and Farah Liana Mohd Redzuan. "Numerical Investigation of the Power Performance of the Vertical-Axis Wind Turbine with Endplates." CFD Letters 14, no. 6 (2022): 90–101. http://dx.doi.org/10.37934/cfdl.14.6.90101.

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An H-rotor vertical axis wind turbine (VAWTs) can operate independently in any wind direction, making it aerodynamically efficient and suitable to harness wind energy in low wind speed areas. The aerodynamic efficiency of VAWTs is highly dependent on the blade geometry, especially the blade tip. Tip vortices produced at the blade tips can negatively affect the VAWT’s aerodynamic efficiency. Adding endplates to the blade tips can minimize the effects of tip vortices on VAWTs. In this paper, several endplate designs are used to evaluate the effectiveness in improving the power coefficient, Cp of

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11

Lin, Jinghua, You-Lin Xu, Yong Xia, and Chao Li. "Structural Analysis of Large-Scale Vertical-Axis Wind Turbines, Part I: Wind Load Simulation." Energies 12, no. 13 (2019): 2573. http://dx.doi.org/10.3390/en12132573.

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When compared with horizontal-axis wind turbines, vertical-axis wind turbines (VAWTs) have the primary advantages of insensitivity to wind direction and turbulent wind, simple structural configuration, less fatigue loading, and easy maintenance. In recent years, large-scale VAWTs have attracted considerable attention. Wind loads on a VAWT must be determined prior to structural analyses. However, traditional blade element momentum theory cannot consider the effects of turbulence and other structural components. Moreover, a large VAWT cannot simply be regarded as a planar structure, and 3D compu

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Dr.Shankaralingappa, H. J. Ranjitha, D. S. Sushmitha, B. Pavan, and Kurubar Pavitra. "Design and Construction of H-Type Darrieus Vertical Axis Wind Turbine." Journal of Research and Advancement in Electrical Engineering 6, no. 2 (2023): 23–31. https://doi.org/10.5281/zenodo.8098537.

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<em>Wind energy is utilized to produce electricity using wind electric generator (WEG). In this paper Vertical axis wind turbine (VAWT) is designed for 5 watts output and simulation is carried out. The suggested VAWT is analyzed mathematically using MATLAB-2014a to produce an output of 5 watts. Various characteristics, such as wind speed, air density, and turbine efficiency, are assumed. The VAWT model is able to generate mechanical power at low wind speeds of 4 to 6 m/s. Prototype model of VAWT has been constructed.</em>

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Lin, Jinghua, You-lin Xu, and Yong Xia. "Structural Analysis of Large-Scale Vertical Axis Wind Turbines Part II: Fatigue and Ultimate Strength Analyses." Energies 12, no. 13 (2019): 2584. http://dx.doi.org/10.3390/en12132584.

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Vertical axis wind turbines (VAWTs) exhibit many advantages and great application prospect as compared with horizontal ones. However, large-scale VAWTs are rarely reported, and the codes and guidelines for designing large-scale VAWTs are lacking. Designing a large-scale composite blade requires precise finite element (FE) modeling and stress analysis at the lamina level, while precise modeling of an entire VAWT is computationally intensive. This study proposes a comprehensive fatigue and ultimate strength analysis framework for VAWTs. The framework includes load determination, finite element (

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14

Talamalek, Ayoub, Mark C. Runacres, and Tim De Troyer. "Impact of rotational direction on wake replenishment mechanisms of counter-rotating paired vertical-axis wind turbines." Journal of Physics: Conference Series 2767, no. 7 (2024): 072005. http://dx.doi.org/10.1088/1742-6596/2767/7/072005.

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Abstract Recent studies have shown that the placement of paired vertical-axis wind turbines (VAWTs) in close proximity is a promising approach to design efficient VAWT farm layouts, mainly due to the increased power output. This study aims to experimentally investigate the impact of the rotational direction of paired counter-rotating VAWTs on their wake characteristics and replenishment mechanisms through a quantitative analysis using the momentum balance equation. The results of this study enhance our understanding of the effect of rotational direction on wake dynamics of counter-rotating pai

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15

Shyu, Lih Shyng, Ching Hai Lee, Yung Chia Hsiao, Ta Ming Shih, Chi Ching Chang, and Da Yung Wang. "High-Efficiency 4kW VAWT Design and Development." Advanced Materials Research 512-515 (May 2012): 617–22. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.617.

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Emerging markets need small sized VAWT (vertical-axis wind turbine) for residential energy supplement. MingDao university wind power R&D team has developed a 4kW VAWT system is response to this need. The development items include innovative blades, generator, power control and mast design. The newly developped 4kW VAWT system demonstrates superior performance. The average VAWT efficiency is 0.31 and the average Cp is 0.39. The preliminary results showed this approach has potential for future applications.

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16

Ung, Shern-Khai, Wen-Tong Chong, Shabudin Mat, Jo-Han Ng, Yin-Hui Kok, and Kok-Hoe Wong. "Investigation into the Aerodynamic Performance of a Vertical Axis Wind Turbine with Endplate Design." Energies 15, no. 19 (2022): 6925. http://dx.doi.org/10.3390/en15196925.

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For the past decade, research on vertical axis wind turbines (VAWTs) has garnered immense interest due to their omnidirectional characteristic, especially the lift-type VAWT. The H-rotor Darrieus VAWT operates based on the lift generated by aerofoil blades and typically possesses higher efficiency than the drag-type Savonius VAWT. However, the open-ended blades generate tip loss effects that reduce the power output. Wingtip devices such as winglets and endplates are commonly used in aerofoil design to increase performance by reducing tip losses. In this study, a CFD simulation is conducted usi

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17

Achdi, Endang, Syahbardia Syahbardia, and Fadhilah Fahmi Rusdianto. "Model Design of Helical Type Vertical Shaft Wind Turbine with Capacity of 5 W." Mestro: Jurnal Teknik Mesin dan Elektro 5, no. 1 (2023): 16–21. http://dx.doi.org/10.47685/mestro.v5i1.399.

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A vertical axis wind turbine (VAWT) is a power generator that uses wind power to generate torque. The VAWT can be pointed in any direction, meaning it doesn't need to be pointed into the wind to generate power. Thus, there is potential for large power plants using VAWTs as their size can be significantly increased. However, there are also some drawbacks to the VAWT. VAWT has the characteristics of self-starting. But still, an additional power source is needed to start the turbine rotation until a certain rotation speed is reached or it must operate at high wind speeds. The main objective of ou

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18

Phan, Quang The, Thị Thu Hà Phan, Ahmed Sherif El-Gizawy, and Thị Hồng Mai Phan. "A Way to Enhance the Efficiency of a Vertical Axis Wind Turbine." Applied Mechanics and Materials 889 (March 2019): 410–17. http://dx.doi.org/10.4028/www.scientific.net/amm.889.410.

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Vertical Axis Wind Turbine (VAWT) can perform better than Horizontal Axis Wind Turbine (HAWT) because VAWTs are relatively simple, quiet, and easy to install. It can take wind from any directions, and operate efficiently in urban areas where turbulent wind conditions usually happen. The weakest point for its configuration, however, is its low efficiency so more intensive research is required.Actual VAWT performance can be predicted based on a determination of the forces acting on blades that produce the turbine’s torque. Thus, this paper proposed a new model of force analysis for calculation o

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19

Hara, Yutaka, Ayato Miyashita, and Shigeo Yoshida. "Numerical Simulation of the Effects of Blade–Arm Connection Gap on Vertical–Axis Wind Turbine Performance." Energies 16, no. 19 (2023): 6925. http://dx.doi.org/10.3390/en16196925.

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Many vertical-axis wind turbines (VAWTs) require arms, which generally provide aerodynamic resistance, to connect the main blades to the rotating shaft. Three–dimensional numerical simulations were conducted to clarify the effects of a gap placed at the blade–arm connection portion on VAWT performance. A VAWT with two straight blades (diameter: 0.75 m, height: 0.5 m) was used as the calculation model. Two horizontal arms were assumed to be connected to the blade of the model with or without a gap. A cylindrical rod with a diameter of 1 or 5 mm was installed in the gap, and its length varied fr

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20

Bausas, Michael De Los Santos, and Louis Angelo Danao. "ON THE PERFORMANCE OF VERTICAL AXIS WIND TURBINES IN STEADY WIND UNDER VARIOUS BLADE CAMBER LEVELS." ASEAN Engineering Journal 6, no. 1 (2015): 12–26. http://dx.doi.org/10.11113/aej.v6.15475.

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Vertical axis wind turbine (VAWT) has been shown to be more suited to small scale power production in the urban environment due to distinct advantages over its horizontal counterpart. Over the last few years, continuous improvement on its aerodynamic performance, either through experimental or numerical analysis, have been carried out by numerous researchers. VAWT performance was investigated using Computational Fluid Dynamics modeling. The influence of camber on steady wind performance was analyzed and the most efficient of all levels of blade camber studied for VAWT application was determine

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Hara, Yutaka, Md Shameem Moral, Aoi Ide, and Yoshifumi Jodai. "Fast Simulation of the Flow Field in a VAWT Wind Farm Using the Numerical Data Obtained by CFD Analysis for a Single Rotor." Energies 18, no. 1 (2025): 220. https://doi.org/10.3390/en18010220.

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The effects of an increase in output power owing to the close arrangement of vertical-axis wind turbines (VAWTs) are well known. With the ultimate goal of determining the optimal layout of a wind farm (WF) for VAWTs, this study proposes a new method for quickly calculating the flow field and power output of a virtual WF consisting of two-dimensional (2-D) miniature VAWT rotors. This new method constructs a flow field in a WF by superposing 2-D velocity numerical data around an isolated single VAWT obtained through a computational fluid dynamics (CFD) analysis. In the calculation process, the V

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22

Abdalrahman, Gebreel, Mohamed A. Daoud, William W. Melek, Fue-Sang Lien, and Eugene Yee. "Design and Implementation of an Intelligent Blade Pitch Control System and Stability Analysis for a Small Darrieus Vertical-Axis Wind Turbine." Energies 15, no. 1 (2021): 235. http://dx.doi.org/10.3390/en15010235.

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A few studies have been conducted recently in order to improve the aerodynamic performance of Darrieus vertical-axis wind turbines with straight blades (H-type VAWTs). The blade pitch angle control is proposed to enhance the performance of H-type VAWTs. This paper aims to investigate the performance of an H-type VAWT in terms of its power output and self-starting capability using an intelligent blade pitch control strategy based on a multi-layer perceptron artificial neural network (MLP-ANN) method. The performance of the proposed blade pitch controller is investigated by adding a conventional

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23

Wang, Quan, Boyang Liu, Cong Hu, Fengyun Wang, and Shuyi Yang. "Aerodynamic shape optimization of H-VAWT blade airfoils considering a wide range of angles of attack." International Journal of Low-Carbon Technologies 17 (December 28, 2021): 147–59. http://dx.doi.org/10.1093/ijlct/ctab092.

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Abstract The current H-type vertical axis wind turbine (VAWT) airfoils are from horizontal axis wind turbine airfoils or symmetry airfoils that are designed at one angle of attack (such as α = 6°) rather than different angles of attack. As a consequence, it cannot, to a certain extent, increase wind power efficiency. Therefore, an optimal method of H-type VAWT blade airfoils in different ranges of angles of attack is presented. It can be expressed by airfoil integrated function. Then, an optimized mathematical model in which the objective function is the average of tangential force coefficient

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Moore, K. R., I. D. Brownstein, and H. K. Ross. "Critical design load case fatigue and ultimate failure simulation for a 10-m H-type vertical-axis wind turbine." Journal of Physics: Conference Series 2767, no. 7 (2024): 072025. http://dx.doi.org/10.1088/1742-6596/2767/7/072025.

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Abstract While previous studies investigating critical vertical-axis wind turbine (VAWT) design load cases have focused on large and relatively flexible Darrieus designs, the bulk of current commercial products seeking certification fall in the relatively small, stiff, H-type configuration. Understanding the critical design load case impacts for both fatigue and ultimate failure for this size and type of VAWT is imperative for certification and to help break the cycle of historical VAWT failures. A reevaluation of each of the design load cases specified in IEC 61400-1 using the Offshore Wind E

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Bel Laveda, Oriol, Marie-Alix Roche, Mohit Phadtare, et al. "Numerical Investigation of Aerodynamic Performance and Structural Analysis of a 3D J-Shaped Based Small-Scale Vertical Axis Wind Turbine." Energies 16, no. 20 (2023): 7024. http://dx.doi.org/10.3390/en16207024.

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Small vertical axis wind turbines (VAWTs) are often considered suitable for use in urban areas due to their compact design. However, they are also well known to offer poor performance at low wind speeds, which is a common situation in such environments. An optimised 3D J-shaped VAWT was designed from standard NACA 0015 blades and analysed numerically through computational fluid dynamics (CFD). A finite element analysis (FEA) was also carried out to ensure the model’s structural integrity. Optimal results were obtained with aluminium alloy hollow blades and stainless-steel struts with X-shaped

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Korprasertsak, Natapol, Nataporn Korprasertsak, and Thananchai Leephakpreeda. "CFD Modeling and Design of Wind Boosters for Low Speed Vertical Axis Wind Turbines." Advanced Materials Research 1016 (August 2014): 554–58. http://dx.doi.org/10.4028/www.scientific.net/amr.1016.554.

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In Thailand, the average wind speed is generally quite low (≈ 3 - 4 m/s). Although Vertical Axis Wind Turbines (VAWTs) are designed for low speed wind, standalone VAWTs are still unable to generate power satisfactorily under that practical condition. This study introduces a new design of a wind flow controlling device, called a “wind booster”, by utilizing Computational Fluid Dynamics (CFD). A wind booster is developed for incorporating with a VAWT in order to increase the performance of the VAWT and to overcome the limitation of harvesting energy with low availability at low speed wind. The g

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Xu, Zhongyun, Jian Chen, Shufan Yu, and Chun Li. "Investigation of the combined influence of arrangement and configuration parameters on the performance of vertical axis wind turbines in staggered arrangements." Journal of Renewable and Sustainable Energy 14, no. 6 (2022): 063305. http://dx.doi.org/10.1063/5.0112908.

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Vertical-axis wind turbine (VAWT) array has attracted much attention due to its higher power density, but existing studies put little emphasis on the configuration parameters of one VAWT in array. Thus, a comprehensive study was carried for the combination effect of arrangement and configuration parameters on the aerodynamic performance of two VAWTs in staggered arrangements. Mutual influence of two turbines under different relative arrangement angles ( θ), turbine spacing, blade pitch angles (BPA), and tip speed ratios of the downstream turbine were investigated. A major finding is that the l

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Elangovan, Karthikvel, and S. Nadaraja Pillai. "Effect of Pitch Angle on Structural and Aerodynamic Characteristics of Vertical-Axis Wind Turbines (VAWTs) Using Leading-Edge Protuberance Blades." Energies 18, no. 2 (2025): 286. https://doi.org/10.3390/en18020286.

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An experimental investigation was carried out to understand the effects of LEP (leading-edge protuberance) blades on the structural characteristics of VAWTs. A series of experiments were performed on VAWTs with straight and LEP blades for a wide range of wind velocity (6 m/s to 20 m/s) and pitch angles (−20° to 20°), and the structural excitations on the VAWT structure were measured using a triaxial accelerometer in each case. The raw acceleration data were extensively processed in the time and frequency domains to identify the variation in structural excitation caused by the unsteady wind and

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Chung, S. W., and G. S. Ju. "A hybrid design of VAWT." International Journal of Low-Carbon Technologies 5, no. 4 (2010): 186–92. http://dx.doi.org/10.1093/ijlct/ctq021.

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Shchur, Ihor, Volodymyr Klymko, Shengbai Xie, and David Schmidt. "Design Features and Numerical Investigation of Counter-Rotating VAWT with Co-Axial Rotors Displaced from Each Other along the Axis of Rotation." Energies 16, no. 11 (2023): 4493. http://dx.doi.org/10.3390/en16114493.

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In this paper, dual-rotor counter-rotating (CR) configurations of vertical axis wind turbines (VAWTs) are briefly inspected and divided into three types. This investigation was focused on one of these types—the CR-VAWT with co-axial rotors, in which two equal rotors are placed on the same shaft, displaced from each other along it and rotated in opposite directions. For this CR-VAWT with three-blade H-Darrieus rotors, the properties of the design in terms of aerodynamics, mechanical transmission and electric generator, as well as control system, are analyzed. A new direct-driven dual-rotor perm

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Roy, Lalit, Kellis Kincaid, Roohany Mahmud, and David W. MacPhee. "Double-Multiple Streamtube Analysis of a Flexible Vertical Axis Wind Turbine." Fluids 6, no. 3 (2021): 118. http://dx.doi.org/10.3390/fluids6030118.

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Vertical-axis wind turbines (VAWTs) have drawn increased attention for off-grid and off-shore power generation due to inherent advantages over the more popular horizontal-axis wind turbines (HAWTs). Among these advantages are generator locale, omni-directionality and simplistic design. However, one major disadvantage is lower efficiency, which can be alleviated through blade pitching. Since each blade must transit both up- and down-stream each revolution, VAWT blade pitching techniques are not yet commonplace due to increased complexity and cost. Utilizing passively-morphing flexible blades ca

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Senga, Hidetaka, Hiroki Umemoto, and Hiromichi Akimoto. "Verification of Tilt Effect on the Performance and Wake of a Vertical Axis Wind Turbine by Lifting Line Theory Simulation." Energies 15, no. 19 (2022): 6939. http://dx.doi.org/10.3390/en15196939.

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Renewable energy has received a lot of attention. In recent years, offshore wind power has received particular attention among renewable energies. Fixed-type offshore wind turbines are now the most popular. However, because of the deep seas surrounding Japan, floating types are more preferable. The floating system is one of the factors that raises the cost of floating wind turbines. Vertical axis wind turbines (VAWT) have a low center of gravity and can tilt their rotors. As a result, a smaller floating body and a lower cost are expected. A mechanism called a floating axis wind turbine (FAWT)

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Setyawan, Agung, Ong Andre Wahyu Riyanto, Slamet Riyadi, Ampar Jaya Suwondo, and Onny Purnamayudhia. "Rancang Bangun Vertical Axis Wind Turbine (VAWT) Dengan Pendekatan Metode Ergonomic Function Deployment (EFD)." Journal of System Engineering and Technological Innovation (JISTI) 2, no. 02 (2023): 154–62. http://dx.doi.org/10.38156/jisti.v2i02.54.

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VAWT adalah turbin angin sumbu vertikal yang gerakan poros dan rotornya sejajar dengan arah angin. Sehingga VAWT dapat bergerak tanpa bergantung pada arah angin. Selain itu VAWT juga dapat bergerak pada kecepatan angin rendah dan menghasilkan listrik karena VAWT memiliki torsi yang tinggi. Tujuan dari penelitian ini adalah VAWT dirancang dengan menggunakan Metode Ergonomic Function Deployment dengan menggunakan tabel House of Ergonomic. Hasil penelitian didapatkan sebuah rancangan VAWT yang ergonomis dengan menggunakan 6 sudu dengan skala pipa paralon 8 dim setelah melalui screening dan select

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Simão Ferreira, Carlos J., Gerard J. W. van Bussel, and Gijs A. M. van Kuik. "Wind Tunnel Hotwire Measurements, Flow Visualization and Thrust Measurement of a VAWT in Skew." Journal of Solar Energy Engineering 128, no. 4 (2006): 487–97. http://dx.doi.org/10.1115/1.2349550.

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The results of experimental research on the wake and induced flow around a vertical axis wind turbine (VAWT) in skew are presented. The previous research on VAWTs in skew is limited because this operation mode has only recently been found to be significant in the operation of VAWTs in the built environment. These results contain hotwire measurements of the incoming flow and wake of a VAWT in nonskewed and skewed flow. The high sampling rate of the hotwire data allows the effects of blade passing to be identified. Flow visualization of the tip vortices is also presented. Thrust measurements of

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Vahidi, Dara, and Fernando Porté-Agel. "Potential of Wake Scaling Techniques for Vertical-Axis Wind Turbine Wake Prediction." Energies 17, no. 17 (2024): 4527. http://dx.doi.org/10.3390/en17174527.

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Analytical wake models are widely used to predict wind turbine wakes. While these models are well-established for horizontal-axis wind turbines (HAWTs), the analytical wake models for vertical-axis wind turbines (VAWTs) remain under-explored in the wind energy community. In this study, the accuracy of two wake scaling techniques is evaluated to predict the change in the normalized maximum wake velocity deficit behind VAWTs by re-scaling the maximum wake velocity deficit behind an actuator disk with the same thrust coefficient. The wake scaling is defined in terms of equivalent diameter, consid

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Totokoja, Joweria, Samson Rwahwire (PhD), Joseph Lwanyaga Ddumba (PhD), Ayub Nabende, and Moses Nagulama. "Optimization Of The Vertical Axis Wind Turbine For Localization In Low Wind Speed Areas." International Journal of Progressive Sciences and Technologies 38, no. 1 (2023): 566. http://dx.doi.org/10.52155/ijpsat.v38.1.5271.

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The vertical axis wind turbines (VAWTs) have proved to show how they are well suited for the urban landscape in production of renewable energy. Thus, the major objective of this study was to develop an optimal model for the vertical axis wind turbine using Computational Fluid Dynamics (CFD). VAWT blades are designed in such a way that they exhibit good aerodynamic performance throughout an entire rotation at various angles of attack they experience leading to optimal performance. In this study, an average unsteady wind flow speed of 10 ms-1 was considered to flow towards the VAWT at angles of

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Liu, Liqun, Chunxia Liu, and Xuyang Zheng. "Modeling, Simulation, Hardware Implementation of a Novel Variable Pitch Control for H-Type Vertical Axis Wind Turbine." Journal of Electrical Engineering 66, no. 5 (2015): 264–69. http://dx.doi.org/10.2478/jee-2015-0043.

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Abstract It is well known that the fixed pitch vertical axis wind turbine (FP-VAWT) has some disadvantages such as the low start-up torque and inefficient output efficiency. In this paper, the variable pitch vertical axis wind turbine (VP-VAWT) is analyzed to improve the output characteristics of FP-VAWT by discussing the force of the six blade H type vertical axis wind turbine (VAWT) under the stationary and rotating conditions using built the H-type VAWT model. First, the force of single blade at variable pitch and fixed pitch is analyzed, respectively. Then, the resultant force of six blade

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Admono, Tri, Yoyon Ahmudiarto, Amma Muliya Romadoni, et al. "Numerical investigation of the effect of triangle strut in vertical axis wind turbine (VAWT)." Journal of Mechatronics, Electrical Power, and Vehicular Technology 11, no. 2 (2020): 95. http://dx.doi.org/10.14203/j.mev.2020.v11.95-101.

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Strut is used in vertical axis wind turbine (VAWT) to restraint the framework. In this study, struts are analyzed to show the pressure losses in VAWT. ANSYS computational fluid dynamics (CFD) software is used to investigate triangle strut in VAWT. This study aims to show a CFD simulation of struts, which affects the aerodynamic of VAWT. In CFD software, the aerodynamic of VAWT can be analyzed in terms of pressure losses in the struts. The simulation method starts by making a struts model, then meshing and setting up ANSYS's boundary conditions. The last iteration runs in ANSYS until convergenc

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Irawan, Elysa Nensy, Nuur Wachid Abdul Majid, Liptia Venica, Fahrur Aslami, and Goro Fujita. "Analyzing the growth and trends of vertical axis wind turbine research: Insight from a bibliometric study." Journal of Mechatronics, Electrical Power, and Vehicular Technology 14, no. 1 (2023): 55–61. http://dx.doi.org/10.14203/j.mev.2023.v14.55-61.

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Bibliometric analysis research has been done for vertical axis wind turbine (VAWT). This study aims to determine the growth of VAWT research, the number of VAWT studies in various countries and the most influential authors to find opportunities for research collaboration, and the challenges of future VAWT research. Research data was taken from Scopus in 1801 articles from 1970-2021. The software used for data interpretation was VosViewer 1.6.19 and Tableau Public 2022.2. Based on the analysis, VAWT research has tended to increase from 1970-2021, although there was a decrease from 1987-2006. Th

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Teeab Tahzib, Mohammed Abdul Hannan, Yaseen Adnan Ahmed, and Iwan Zamil Mustaffa Kamal. "Performance Analysis of H-Darrieus Wind Turbine with NACA0018 and S1046 Aerofoils: Impact of Blade Angle and TSR." CFD Letters 14, no. 2 (2022): 10–23. http://dx.doi.org/10.37934/cfdl.14.2.1023.

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Despite the widespread research and development of HAWTs in recent times, VAWTs are gaining in popularity due to certain critical advantages they provide, for example, wind direction independency. While most existing studies focused on analysing the performance of VAWT using NACA aerofoils, this study compares the performance of NACA0018 and S1046 aerofoil profiles for a range of Speed Ratios (TSRs) and blade pitch angles. It has been found that the S1046 is less sensitive to changes in wind speed, and is thus, a superior choice for urban applications where the wind speed is comparatively low

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Gu, Qiuyu, Zhipeng Tang, and Wanna Chang. "Performance research of VAWT with expandable blades based on savonius turbines." SHS Web of Conferences 145 (2022): 01019. http://dx.doi.org/10.1051/shsconf/202214501019.

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In order to improve the wind energy utilization of vertical axis wind turbine (VAWT), this paper presents a new structure of VAWT with expandable blades. The blades of the new turbine are symmetrical airfoil NACA0012 instead of curved blades. The blades of the new structure VAWT have open and folded state. While the blades rotate to the windward side, the blades are open and similar to the curved blades of the S-type turbine. While the blades rotate to the leeward side, the blades are folded and similar to the airfoil of the H-type turbine. In this paper, multistream tube theory was used to an

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Zou, Li, Kun Wang, Yichen Jiang, Aimin Wang, and Tiezhi Sun. "Wind Tunnel Test on the Effect of Solidity on Near Wake Instability of Vertical-Axis Wind Turbine." Journal of Marine Science and Engineering 8, no. 5 (2020): 365. http://dx.doi.org/10.3390/jmse8050365.

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Owing to the rapid development of the offshore wind power technology and increasing capacity of wind turbines, vertical-axis wind turbines (VAWTs) have experienced a great development. Nevertheless, the VAWT wake effect, which affects the power generation efficiency and rotor fatigue life, has not been thoroughly understood. In this study, the mid-span wake measurements on a VAWT in six different configurations were conducted. This study aimed to investigate the effect of solidity on near wake instability of vertical-axis wind turbine. By using the wavelet analysis method to analyse the measur

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Gerrie, Sean, Sheikh Zahidul Islam, Cameron Gerrie, Ghazi Droubi, and Taimoor Asim. "The Impact of Ice Formation on Vertical Axis Wind Turbine Performance and Aerodynamics." Wind 3, no. 1 (2023): 16–34. http://dx.doi.org/10.3390/wind3010003.

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This study investigated the impact of ice formation on the performance and aerodynamics of a vertical axis wind turbine (VAWT). This is an area that is becoming more prevalent as VAWTs are installed alongside horizontal axis wind turbines (HAWTs) in high altitude areas with cold and wet climates where ice is likely to form. Computational fluid dynamics (CFD) simulations were performed on a VAWT without icing in Ansys to understand its performance before introducing ice shapes obtained through the LewInt ice accretion software and repeating simulations in Ansys. These simulations were verified

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Kadhim, H. S., G. A. Quadir, A. K. Farhan, U. Ryspek, and K. A. Ismail. "Numerical Simulation for the Aerodynamics of Vertical Axis Wind Turbine with Two Different Rotors Having Movable Vanes." Applied Mechanics and Materials 786 (August 2015): 205–9. http://dx.doi.org/10.4028/www.scientific.net/amm.786.205.

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Wind energy has seen a rapid growth worldwide. Wind turbines are typical devices that convert the kinetic energy of wind into electricity. Researches in the past have proved that Vertical Axis Wind Turbines (VAWTs) are more suitable for urban areas than Horizontal Axis Wind Turbines (HAWTs). In the present design of the VAWT, the power prodused depends on the drag force generated by the individual blades and interactions between them in a rotating configuration. Numerical simulation for the aerodynamics of VAWT with tow different rotors (Three and Foure blades ) having movable vanes are curred

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Zhang, Tengyue, Gang Wang, and Quanzheng Li. "Effects of a J-Shaped Blade on the Performance of a Vertical-Axis Wind Turbine Using the Improved Delayed Detached Eddy Simulation Method." Machines 13, no. 5 (2025): 403. https://doi.org/10.3390/machines13050403.

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Vertical-axis wind turbines (VAWTs) offer key advantages such as independence from wind direction, low manufacturing costs, and reduced noise levels, making them highly suitable for urban and offshore wind energy applications. Among various VAWT designs, the J-shaped VAWT demonstrates improved energy capture at low and medium tip speed ratios (TSRs) compared to symmetrical blade VAWTs, which has garnered increased interest in recent years. However, the mechanisms by which J-shaped blades enhance VAWT performance remain insufficiently explored. In this paper, the high-resolution three-dimension

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NURWICAKSANA, WAHYU AULIA, BUDHY SETIAWAN, IKA NOER SYAMSIANA, and SEPTYANA RISKITASARI. "Kontrol Angle of Attack untuk Optimasi Daya padaVertical Axis Wind Turbine Tipe Darrieus." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 8, no. 3 (2020): 492. http://dx.doi.org/10.26760/elkomika.v8i3.492.

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ABSTRAKVAWT (Vertical Axis Wind Turbine) tipe Darrieus NACA0015 merupakan salah satu model dari turbin angin yang bekerja dengan menggunakan angin sebagai sumber penggerak. Namun dari hasil pengamatan, kecepatan angin yang ada tidak konstan setiap saat. Sehingga dari permasalahan ini perlu suatu kontrol yaitu dengan mengendalikan sudut kerja blade VAWT yang dikenal dengan kontrol angle of attack (AoA). Prinsip kerja kontrol AoA yaitu sudut blade diatur agar VAWT bekerja secara optimum dan dapat meningkatkan efisiensi. Metode kontrol AoA menggunakan PID (Proportional–Integral–Derivative) dengan

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Asim, Taimoor, and Sheikh Zahidul Islam. "Effects of Damaged Rotor on Wake Dynamics of Vertical Axis Wind Turbines." Energies 14, no. 21 (2021): 7060. http://dx.doi.org/10.3390/en14217060.

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Vertical Axis Wind Turbines (VAWTs) are omnidirectional turbomachines commonly used in rural areas for small-to-medium-scale power generation. The complex flow observed in the wake region of VAWTs is affected by a number of factors, such as rotor blades design. A damaged rotor significantly alters the flow field in the wake region of the VAWT, degrading its power generation capability. Published literature on damaged wind turbine blades is severely limited to torque signal analysis and basic flow field description in the wake region. In this study, detailed numerical investigations have been c

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Christie, Jamie, Thomas Lines, Dillon Simpson, Taimoor Asim, Muhammad Salman Siddiqui, and Sheikh Zahidul Islam. "Numerical Investigations on the Transient Aerodynamic Performance Characterization of a Multibladed Vertical Axis Wind Turbine." Energies 17, no. 8 (2024): 1900. http://dx.doi.org/10.3390/en17081900.

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The use of vertical axis wind turbines (VAWTs) in urban environments is on the rise due to their relatively smaller size, simpler design, lower manufacturing and maintenance costs, and above all, due to their omnidirectionality. The multibladed drag-based VAWT has been identified as a design configuration with superior aerodynamic performance. Numerous studies have been carried out in order to better understand the complex aerodynamic performance of multibladed VAWTs employing steady-state or quasi-steady numerical methods. The transient aerodynamics associated with a multibladed VAWT, especia

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Agarwal, Abhishek. "Computational Investigation of Vertical Axis Wind Turbine in Hydrogen Gas Generation Using PEM Electrolysis." Journal of New Materials for Electrochemical Systems 25, no. 3 (2022): 172–78. http://dx.doi.org/10.14447/jnmes.v25i3.a03.

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Both offshore wind and hydrogen generation are increasingly seen as central to global decarbonization. The objective of current research is to investigate the effect of wind turbine height of Vertical Axis Wind Turbine (VAWT) on hydrogen generation. The numerical investigation of VAWT is conducted using techniques of Computational Fluid Dynamics. The VAWT design is developed in Solidworks design software and CFD analysis is conducted using ANSYS CFX software. The CFD analysis conducted on VAWT aided to determine the torque generated from it at 10m/s wind velocity determining the system impacts

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Wu, Ai Hua, Jing Feng Mao, Guo Qing Wu, Xu Dong Zhang, Yang Cao, and Bo Shao. "Design of an Electromechanical Coordination Vibration Suppression Method for VAWT Main Spindle." Applied Mechanics and Materials 271-272 (December 2012): 829–32. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.829.

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Because of its advantageous aerodynamic performance, the vertical-axis wind turbine (VAWT) has gained more and more attention. This paper studies the vibration characteristic of the VAWT main spindle, and presents a mechanical and electromechanical coordination vibration suppression method for the VAWT main spindle. The proposed method can measure main spindle current vibration intensity in real-time. And when the main spindle vibration intensity exceeds preset critical control threshold value, the method can use both the on-line intelligent analysis decision and the mechanical and electromech

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