A numerical study of strut and tower influence on the performance of vertical axis wind turbines using computational fluid dynamics simulation

Aihara, Aya; Mendoza, Víctor; Goude, Anders; Bernhoff, Hans

doi:10.1002/we.2704

Cited by 12 publications

(10 citation statements)

References 34 publications

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“…The mesh resolution satisfies the requirement for the wall functions, that is, y + < 300. The sensitivity of the mesh resolution and the domain size to the simulation results has been investigated previously [31]. The numbers of mesh cells are 19 and 33 million for the case containing only blades and the case including both blades and struts, respectively.…”

Section: Rans Modelmentioning

confidence: 99%

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Comparison of Three-Dimensional Numerical Methods for Modeling of Strut Effect on the Performance of a Vertical Axis Wind Turbine

et al. 2022

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This paper compares three different numerical models to evaluate their accuracy for predicting the performance of an H-rotor vertical-axis wind turbine (VAWT) considering the influence of struts. The strut of VAWTs is one factor that makes the flow feature around the turbine more complex and thus influences the rotor performance. The focus of this study is placed on analyzing how accurately three different numerical approaches are able to reproduce the force distribution and the resulting power, taking the strut effect into account. For the 12 kW straight-bladed VAWT, the blade force is simulated at three tip speed ratios by the full computational fluid dynamics (CFD) model based on the Reynolds-averaged Navier–Stokes (RANS) equations, the actuator line model (ALM), and the vortex model. The results show that all the models do not indicate a significant influence of the struts in the total force over one revolution at low tip speed ratio. However, at middle and high tip speed ratio, the RANS model reproduces the significant decrease of the total tangential force that is caused due to the strut. Additionally, the RANS and vortex models present a clear influence of the struts in the force distribution along the blade at all three tip speed ratios investigated. The prediction by the ALM does not show such distinctive features of the strut impact. The RANS model is superior to the other two models for predicting the power coefficient considering the strut effect, especially at high tip speed ratio.

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Section: Rans Modelmentioning

confidence: 99%

“…Figure 4. View of the mesh at the hub height for the wake region (left), the rotational region (middle), and the area near the blade (right)[31].…”

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confidence: 99%

Comparison of Three-Dimensional Numerical Methods for Modeling of Strut Effect on the Performance of a Vertical Axis Wind Turbine

et al. 2022

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“…The efficiency of VAWT for optimized turbulence was improved from 7.9% to 38% as compared to smooth flow. Aihara et al 121 studied the effect of the tower and strut on the performance of VAWT. Computational analysis was performed for three different cases and results revealed a decrease in C .1em p by 43% which leads to proper modeling of the strut for accurate prediction of the performance.…”

Section: Darrieus Wind Turbinesmentioning

confidence: 99%

An overview of aerodynamic performance analysis of vertical axis wind turbines

Ahmad

Shahzad

Mumtaz

2022

Energy & Environment

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In this paper, an attempt has been made to highlight major developments of vertical axis wind turbines (VAWTs) in the last few decades. The effects of various design parameters such as airfoil, number of blades, solidity, aspect ratio, blade helicity, and overlap ratio have been critically analyzed. Wind energy is the most promising renewable, cost-effective, efficient, and accessible source for both domestic and commercial applications. Horizontal axis wind turbines are highly developed and are being used for medium-to-large scale power projects. VAWT are considered viable options for urban and semi-urban areas. These turbines have several characteristics, such as omnidirectional, power generation in weak and unstable winds, esthetically sound, safety, and low noise. Darrieus turbines with a fixed blade-type have starting problems at low wind speeds. Savonius turbines have good starting capability; however, their power coefficients are lower than other types of VAWT. To overcome the shortcomings of conventional wind turbines, an innovative engineering solution was sought in the design of hybrid VAWT. The analysis revealed that hybrid wind turbines have addressed the deficiencies to an extent; however, the overall performance is still less than that of conventional wind turbines. Several recommendations have been made based on state-of-the-art information from the perspective of future studies and acceptability. It was concluded that vast opportunities for wind turbine applications are available in urban areas; however, further academic research is required on critical aspects such as self-starting at low wind speeds, efficiency, structural reliability, design improvement for aerodynamic performance, and wind resource assessment.

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“…The blades of turbines are linked to rotor, which in turn operates a generator, with the help of the wind. A distinction is made between the Vertical Axis Wind Turbines (VAWTs) [10] and Horizontal Axis Wind Turbines (HAWTs) [11] when it comes to the orientation of the blades. The HAWT wind turbine is now the most often used design.…”

Section: Disadvantages Of Solar Energymentioning

confidence: 99%

A Survey of Renewable Energy Sources and their Contribution to Sustainable Development

Haldorai¹

2022

JEBI

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Many nations must undergo economic growth, and this will inevitably lead to a rise in population, both of which will have consequences for the natural environment. This is due to the fact that producing energy (whether for electricity, cooling, heating or power for transportation motors and other applications) is an ecologically inefficient and wasteful activity that contributes to pollution. Considered crucial to the creation of prosperity, energy is widely recognized as an important factor in economic growth. It has a crucial role in alleviating poverty and fostering long-term growth. It has a beneficial impact on social, economic, and environmental development in areas such as livelihoods, water availability, agricultural production, health, population levels, educational equity, and addressing the needs of women and girls. Due to this, energy resources are crucial for every nation on Earth. This paper provides a discussion of the benefits to the economy, environmental effects (including on global warming), pros and cons, and methods for optimal utilization with regards to renewable energy sources and their role in sustainable development.

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A numerical study of strut and tower influence on the performance of vertical axis wind turbines using computational fluid dynamics simulation

Cited by 12 publications

References 34 publications

Comparison of Three-Dimensional Numerical Methods for Modeling of Strut Effect on the Performance of a Vertical Axis Wind Turbine

Comparison of Three-Dimensional Numerical Methods for Modeling of Strut Effect on the Performance of a Vertical Axis Wind Turbine

An overview of aerodynamic performance analysis of vertical axis wind turbines

A Survey of Renewable Energy Sources and their Contribution to Sustainable Development

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