Computational studies on Darrieus VAWT noise mechanisms employing a high order DDES model

Dessoky, Amgad; Lutz, Thorsten; Bangga, Galih; Krämer, Ewald

doi:10.1016/j.renene.2019.04.133

Cited by 28 publications

(18 citation statements)

References 32 publications

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“…The wind turbine at the original scale is numerically investigated and validated using the FLOWer flow solver at the IAG by Dessoky et al (2019). The results showed good agreement with experiments.…”

Section: Cfd Modelmentioning

confidence: 89%

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Computational-fluid-dynamics analysis of a Darrieus vertical-axis wind turbine installation on the rooftop of buildings under turbulent-inflow conditions

Zamre

Lutz²

2022

Wind Energ. Sci.

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Abstract. The behaviour of a rooftop-mounted generic H-rotor Darrieus vertical-axis wind turbine (H-VAWT) is investigated numerically in realistic urban terrain. The interaction of the atmospheric boundary layer with the different buildings, topography, and vegetation present in the urban environment leads to the highly turbulent-inflow conditions with continuously changing inclination and direction. Consequently, all these factors can influence the performance of a VAWT significantly. In order to simulate a small H-VAWT at rooftop locations in the urban terrain under turbulent-inflow conditions, a computational approach is developed. First, the flow field in the terrain is initialized and computed with inflow turbulence. Later, the mesh of wind turbine is superimposed on the mesh of the terrain at two distinct locations and different heights for further computation in the turbulent flow field. The behaviour of the H-VAWT is complex due to the 3D unsteady aerodynamics resulting from continuously changing the angle of attack, blade–wake interaction, and dynamic stall. To get more insight into the behaviour of a rooftop-mounted H-VAWT in turbulent flow, high-fidelity delayed detached-eddy simulations (DDESs) are performed at different rooftop positions and the results compared against the behaviour under uniform-inflow conditions in the absence of inflow turbulence. It is found that the performance of a wind turbine is significantly increased near the rooftop positions. The skewed flow at the rooftop location increases the complexity. However, this effect contributes positively to increasing the performance of H-VAWT wind turbines.

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Section: Cfd Modelmentioning

confidence: 89%

“…The results showed good agreement with experiments. In the present study, the computational set-up including time steps is consistent with Dessoky et al (2019). As described in Sect.…”

Section: Cfd Modelmentioning

confidence: 99%

Computational-fluid-dynamics analysis of a Darrieus vertical-axis wind turbine installation on the rooftop of buildings under turbulent-inflow conditions

Zamre

Lutz²

2022

Wind Energ. Sci.

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“…However, even these low levels of noise can become extremely annoying and unpleasant for some people and can have negative impacts on their health (Pedersen and Waye, 2008). Dessoky et al (2019) lists the various sources that lead to noise in a Darrius type VAWT and conclude that the study of their acoustic behavior is much complicated than a HAWT. According to them, the noise generated by a VAWT can be broadly divided into mechanical and aerodynamic.…”

Section: Environmental Impactsmentioning

confidence: 99%

Vertical axis wind turbine operation in icing conditions: A review study

Tahir

Virk

2021

Wind Engineering

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Vertical Axis Wind Turbine (VAWT) can be a promising solution for electricity production in remote ice prone territories of high north, where good wind resources are available, but icing is a challenge that can affect its optimum operation. A lot of research has been made to study the icing effects on the conventional horizontal axis wind turbines, but the literature about vertical axis wind turbines operating in icing conditions is still scarce, despite the importance of this topic. This paper presents a review study about existing knowledge of VAWT operation in icing condition. Focus has been made in better understanding of ice accretion physics along VAWT blades and methods to detect and mitigate icing effects.

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“…Increasing the angle of attack will modify the pressure distribution on the upper surface. This continues till separation of flow occurs [34][35], which is believed responsible for inducing noise emissions [36]. Uneven distribution of pressure on both surfaces of the airfoil considerably modifies the drag, lift and moment coefficient of the airfoil.…”

Section: Performance Of Savonius-darrieus Integrating Wind Turbinementioning

confidence: 99%

A Computational Fluid Dynamics Study of an Integrating Savonius-Darrieus Vertical Axis Wind Turbine

Mahrous

2020

ARFMTS

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To combine the advantages of performance of both Savonius and Darrieus wind turbines, this paper aims to study computationally a novel design configuration of a Vertical Axis Wind Turbine (VAWT). The new design would help cover a broad range of performance parameters between both types of wind turbines as well as overcome drawbacks of the Savonius type at higher rotational speed. The proposed design is to integrate both of Savonius and straight blade Darrieus wind turbines in a single VAWT design configuration. In this design, the turbine rotor consists of a number of similar NACA0015 airfoil blades set in a particular arrangement. By regulating individual angles of rotor blades, the turbine would work as either Savonius or H-Darrieus VAWT. The turbine could also be set to work at different configurations between those for the Savonius and H-Darrieus ones. The computational results revealed that the performance of the proposed integrating wind turbine would be controlled and optimized to cover the operating range of both of Savonius and Darrieus wind turbines. Besides, the performance of Savonius VAWT would be modified when applying this design. When the proposed design is practically implemented, characteristics of both of Savonius and H-Darrieus based wind turbines would be found in a single design.

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Computational studies on Darrieus VAWT noise mechanisms employing a high order DDES model

Cited by 28 publications

References 32 publications

Computational-fluid-dynamics analysis of a Darrieus vertical-axis wind turbine installation on the rooftop of buildings under turbulent-inflow conditions

Computational-fluid-dynamics analysis of a Darrieus vertical-axis wind turbine installation on the rooftop of buildings under turbulent-inflow conditions

Vertical axis wind turbine operation in icing conditions: A review study

A Computational Fluid Dynamics Study of an Integrating Savonius-Darrieus Vertical Axis Wind Turbine

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