Influence of actuation parameters of multi-DBD plasma actuators on the static and dynamic behaviour of an airfoil in unsteady flow

Giorgi, Maria Grazia De; Motta, Valentina; Suma, Antonio

doi:10.1016/j.ast.2019.105587

Cited by 40 publications

(5 citation statements)

References 34 publications

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“…The control of unsteady load is confirmed also in other recent studies [11], that demonstrate the feasibility of using multiple dielectric barrier discharge (multi-DBD) plasma actuators (PAs) as a novel approach for load alleviation and stability control of airfoils in unsteady flow.…”

Section: Flow Control Applicationssupporting

confidence: 69%

Special Issue “Active Flow Control Technologies for Energy and Propulsive Systems”

Giorgi

Ficarella

2019

Applied Sciences

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Section: Flow Control Applicationssupporting

confidence: 69%

Special Issue “Active Flow Control Technologies for Energy and Propulsive Systems”

Giorgi

Ficarella

2019

Applied Sciences

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“…In addition, such load alleviation was attempted through circulation control using multiple-DBD actuators on a wind turbine blade [228], which showed effective load tailoring based on the jet flow direction. Nevertheless, micro-DBD plasma actuators were found effective in load alleviation and stability control [229], where a combination of actuators excited in different modes successfully mitigated aerodynamic load and improved flow stability, thereby alleviating blade fatigue and enhancing aeroelasticity.…”

Section: Plasma Actuatorsmentioning

confidence: 99%

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

Akhter

Omar

2021

Energies

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It is projected that, in the following years, the wind‐energy industry will maintain its rapid growth over the last few decades. Such growth in the industry has been accompanied by the desirability and demand for larger wind turbines aimed at harnessing more power. However, the fact that massive turbine blades inherently experience increased fatigue and ultimate loads is no secret, which compromise their structural lifecycle. Accordingly, this demands higher overhaul‐and‐maintenance (O&M) costs, leading to higher cost of energy (COE). Introduction of flow‐control devices on the wind turbine is a plausible solution to this issue. Flow‐control mechanisms feature the ability to effectively enhance/suppress turbulence, advance/delay flow transition, and prevent/promote separation, leading to enhancement in aerodynamic and aeroacoustics performance, load alleviation and fluctuation suppression, and eventually wind turbine power augmentation. These flow‐control devices are operated primarily under two schemes: passive and active control. Development and optimization of flow‐control devices present the potential for reduction in the COE, which is a major challenge against traditional power sources. This review performs a comprehensive and up‐to‐date literature survey of selected flow‐control devices, from their time of development up to the present. It contains a discussion on the current prospects and challenges faced by these devices, along with a comparative analysis centered on their aerodynamic controllability. General considerations and conclusive remarks are presented after the discussion.

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“…Instead, an active flow control method with energy consumption, which may be a kind of weakness, promotes the performance of the HAWT. Synthetic jet actuators (SJA) 1 and dielectric barrier discharge (DBD) 2 can be named as examples of active flow control methods. Riblets, vortex generators (VGs), grooves, slots, surface roughness, and dimples on blades 3–9 are methods that can be categorized into passive flow controls.…”

Section: Introductionmentioning

confidence: 99%

Performance improvement of horizontal axis wind turbines using curved gurney flap: 3D numerical investigation

Sedighi,

Akbarzadeh,

Salavatipour

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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The impact of curved Gurney flaps on the performance of a 660 kW V47 horizontal axis wind turbine (HAWT) is analyzed in this study. The trailing edge of the turbine blades is passively modified by curved flaps. The continuity and momentum equations are solved using a Reynolds-averaged Navier-Stokes solver and Shear-Stress-Transport turbulent model. The effect of the direction and radius of curved flaps on the aerodynamic performance of the wind turbine (torque and power generation, flow separation, and thrust loads) is examined. The study examines how the curved flap’s performance on HAWT is affected by the blade pitch angle ([Formula: see text]) and wind speed ([Formula: see text]). According to the results, curve flaps have a positive impact on the output torque at lower pitch angles ([Formula: see text]). The average torque increase for [Formula: see text] and [Formula: see text] is 3.7% for curve flaps, while it is only 2.9% for flat flaps. This conclusion is not valid for higher pitch angles ([Formula: see text]) where the flap disrupts the aerodynamic performance. Further, the use of curve flaps with the radius of [Formula: see text] (inward-type) can improve the torque produced (up to [Formula: see text]) compared to other curved flaps and even flat flaps, especially around the nominal operating point. This conclusion is valid for [Formula: see text], while for higher pitch angles, the flat Gurney flap has better performance generally.

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Influence of actuation parameters of multi-DBD plasma actuators on the static and dynamic behaviour of an airfoil in unsteady flow

Cited by 40 publications

References 34 publications

Special Issue “Active Flow Control Technologies for Energy and Propulsive Systems”

Special Issue “Active Flow Control Technologies for Energy and Propulsive Systems”

Review of Flow-Control Devices for Wind-Turbine Performance Enhancement

Performance improvement of horizontal axis wind turbines using curved gurney flap: 3D numerical investigation

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