Increase in the annual energy production due to a retrofit of vortex generators on blades

Skrzypiński, Witold Robert; Gaunaa, Mac; Bak, Christian; Junker, Birgit; Brønnum, Niels Bruhn; Kruse, Emil Krog

doi:10.1002/we.2446

Cited by 9 publications

(11 citation statements)

References 13 publications

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“…The high-energy vortex was generated at the tail of VGs and could suppress the flow separation. VGs had a wide range of applications (Bagheri et al, 2021; Ramanathan et al, 2019; Rao et al, 2020; Skrzypiński et al, 2020; Zeng et al, 2019). Skrzypiński et al (2020) analyzed the effect of the retrofitting VGs on the blades of the megawatt-sized wind turbine.…”

Section: Methodsmentioning

confidence: 99%

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Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Chen

Wang

et al. 2021

Wind Engineering

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The transition area of the blade had a large relative thickness of airfoil, which was prone to the flow separation. The vortex generators (VGs) could restrain the flow separation. In this paper, the VGs were installed at the transition area of the WindPACT 1.5 MW wind turbine blades. The numerical simulation method was used to investigate the effects of the VGs on the aerodynamic performance of the blade. The high-energy vortexes were generated at the tail by the VG. It could change the energy distribution and flow characteristics of the airflow in the boundary layer. There were influences by the geometric parameters of the VGs. The VGs could change the aerodynamic performance at the transition area of the blade. A satisfactory result was obtained for reasonable geometrical parameters of the VGs. It also could restrain the flow separation of the blade surface and improve the torque.

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Section: Methodsmentioning

confidence: 99%

“…VGs had a wide range of applications (Bagheri et al, 2021; Ramanathan et al, 2019; Rao et al, 2020; Skrzypiński et al, 2020; Zeng et al, 2019). Skrzypiński et al (2020) analyzed the effect of the retrofitting VGs on the blades of the megawatt-sized wind turbine. Many factors affected the effects of the VGs.…”

Section: Methodsmentioning

confidence: 99%

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Chen

Wang

et al. 2021

Wind Engineering

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“…The idea is not new and has been employed not only on aircraft wings, fuselage, and rotor blades, but also on other transport vehicles. [53][54][55][56][57][58][59][60][61][62][63][64] There are even patented solutions. 59 It is interesting that vortex generators are utilized in both sub-and supersonic flows.…”

Section: Passive Flow Controlmentioning

confidence: 99%

Current state and future trends in boundary layer control on lifting surfaces

Svorcan

Wang

Griffin

2022

Advances in Mechanical Engineering

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Successful flow control may bring numerous benefits, such as flow stabilization, flow reattachment, separation delay, drag reduction, lift increase, aerodynamic performance improvement, energy efficiency increase, shock delay or weakening, noise reduction, etc. For these purposes, many different flow control devices, which can be classified as passive, semi-active and active, have been designed and tested. This review paper aims to highlight the most promising and commonly employed boundary layer control methods as well as outline their potential in specific applications in aerospace and energy engineering. Referenced studies, performed on various geometries (flat plates, channels, airfoils, wings, blades, cylinders), are primarily numerical or experimental. Although enhanced aerodynamic performance is achieved in many cases, further research is required to draw general conclusions. This paper aims to demonstrate that, in the future, we may expect further developments of flow control actuators, as well as their increased application.

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“…Presently, there is no direct standard for the performance evaluation of vortex generators, and the performance of vortex generators can only be assessed by indirect measures, such as calculating the improvement of the blade lift coefficient or the improvement of the annual power generation of wind turbines [13][14][15]. In flat plate experiments on vortex generators, only the magnitude and dissipation of vortices are mostly explored, and there are no direct arguments to compare the performance of vortex generators.…”

Section: Introductionmentioning

confidence: 99%

Calculation of the Strength of Vortex Currents Induced by Vortex Generators on Flat Plates and the Evaluation of Their Performance

Zhang

2022

Energies

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Vortex generators are used to overturn the momentum of the flow in the boundary layer, thereby preventing flow separation, and are broadly used in aviation, wind power, heat exchange, and different fields. It has been determined that the capability of an eddy current generator to manipulate the boundary layer is proportional to the intensity of the vortex strength it excites. Although the mathematical notion of vortex strength is very well defined, there are difficulties in figuring out vortex strength in applications. This article proposes a calculation method based on confidence intervals and contour eddy current intensity. Meanwhile, the contemporary overall performance evaluation of vortex generators is frequently obtained in a roundabout way through their consequences on feature factors (e.g., lift coefficients, etc.), and techniques for the direct assessment of a vortex generator’s overall performance are no longer available. To address this situation, the article derives the performance evaluation criterion of the equal height vortex generators, the harmonic intensity factor (K=ωpeak r′), based on the Biot–Savart theorem.

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Increase in the annual energy production due to a retrofit of vortex generators on blades

Cited by 9 publications

References 13 publications

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Current state and future trends in boundary layer control on lifting surfaces

Calculation of the Strength of Vortex Currents Induced by Vortex Generators on Flat Plates and the Evaluation of Their Performance

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