A triangular vortex generator modeling on a DU97-W-300 airfoil by a source term model

Galera, Larissa; Martínez-Filgueira, Pablo; Fernández-Gámiz, Unai; Zulueta, Ekaitz; Lopez, JM; Ilzarbe, Jesús María Blanco

doi:10.1177/0957650919850449

Cited by 9 publications

(7 citation statements)

References 40 publications

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“…The reasons for this offset will be discussed in detail in section 4.3. Finally regarding the delta VG with BAY, the qualitative agreement to the work of Galera et al [10], who investigated the same setup (i.e. DU 97-W-300 with delta VGs) with the jBAY model, [3] is very good.…”

Section: Vorticity Distributionsupporting

confidence: 81%

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Numerical Assessment of a BAY-Type Model for different Vortex Generator Shapes Applied on a Wind Turbine Airfoil

Seel

Blazejewski

Lutz

et al. 2022

J. Phys.: Conf. Ser.

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Modern wind turbines are increasingly equipped with vortex generators in the inner part of the rotor blade. On large blades it is usual to install hundreds of these small passive devices to delay flow separation. Therefore, affordable numerical methods to include vortex generators in the design process are required. One very promising method based on the addition of source terms in the flow equations is the BAY model. In this work a BAY-type model is presented and assessed for three different vortex generator shapes (rectangular, delta and cropped-delta) placed on a DU 97-W-300 airfoil and computed with steady-state Reynolds-averaged Navier-Stokes numerical methods. In order to quantify the circulation of the main streamwise vortex, a method to identify the vortex core based on the λ2-criterion is presented and shows good results. The computations reveal very good agreement with the experimental data for attached flow in terms of lift and pressure distribution while drag is inherently underestimated by the BAY model due to the inviscid modelling of the vortex generators. It is displayed that this underestimation is proportional to the vortex generator surface area. Concerning the different shapes, it is shown that the delta shape reveals larger deviations from the fully resolved case than the other geometries and therefore requires higher mesh resolution.

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Section: Vorticity Distributionsupporting

confidence: 81%

“…This has a strong influence on the main vortex evolution as vortex interaction accelerates the dissipation process and, hence, may change the efficiency of the VGs due to the chosen modelling approach. Further research on the BAY and the jBAY models was undertaken by several authors [9,10,11].…”

Section: Introductionmentioning

confidence: 99%

Numerical Assessment of a BAY-Type Model for different Vortex Generator Shapes Applied on a Wind Turbine Airfoil

Seel

Blazejewski

Lutz

et al. 2022

J. Phys.: Conf. Ser.

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“…«Tuberkulu-efektu» horrek bulkada handiagoa ematen dio baleari, eta horrek hegatsak angelu nabarmenagoetan biratzeko aukera ematen dio, eta urarekiko erresistentzia murrizten du, zeina onura garrantzitsua den, hegatsak luzeak baitira (balearen gorputzaren luzeraren ia heren bat). Ezaugarri hori mareen korrontetik (tidal turbines) energia lortzen duten turbinetan erabili da, marea-energia aplikazioetan, muga-geruzaren jaulkipena atzeratu daitekeela frogatuz, baita «drag»/»lift» ratioak handitzea ere korrontearen energia hobeto aprobetxatzeko [15,16], 1. irudian ikus daitekeen bezala.…”

Section: Biomimesiaren Aplikazioak Itsas Energiak Atzemateko Gailuetanunclassified

“…Aplikazio biomimetikoak itsas energien atzemate-gailuetan 1. irudia. Ezkerra: Tidal turbina baten errotorearen irudia [15], eta eskuina: balea konkordun baten hegatsa [17].…”

Section: Biomimesiaren Aplikazioak Itsas Energiak Atzemateko Gailuetanunclassified

Aplikazio biomimetikoak itsas energien atzemate-gailuetan

Izquierdo¹,

Vázquez²,

Ilzarbe³

et al. 2021

EKAIA

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Natura inspirazio-iturri gisa aztertzeak itsasotik datorren energiaz baliatzeko makinak diseinatzea eragin du. Dokumentu honek biomimesian oinarrituriko itsas gailuak aztertzen ditu, haien portaeraren ondorioz, energia bereganatzea errazten duten horietan oinarrituz [1]. Azkenik, marrazoen larruazala jariakinaren muga-geruza apurtzea ahalbidetzen duten espikula txikiz osatuta dagoenez, haren mugimenduarekiko erresistentzia murriztuz [2], eta fenomeno honetan oinarrituz, olatuak sortzeko erabiltzen diren olatu kanaletan (waveflumes) energia xahutzeko sistemetan aztertzen den aplikazioa zehaztuko da.

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“…Flow separation is one of the most destructive factors that can be controlled by active or passive flow controllers. [3][4][5][6] PAs are one type of active flow control devices which have been a topic of interest for industrial, environmental, and aeronautical applications during the past few decades because of their simplicity, low weight, low power consumption, and fast flow response while having no moving parts. 7,8 As an active flow control technology, PA was shown to have highly beneficial impacts on wind turbine airfoil performance.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of a horizontal axis wind turbine airfoil performance using single dielectric barrier discharge plasma actuator

Fadaei

Davari

Sabetghadam

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part A:

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Wind turbines are of the most promising devices to cut down carbon emissions. However, some phenomena that adversely affect their performance are inevitable. The aim of the present paper is to investigate flow separation prevention exploiting leading edge (LE) single dielectric barrier discharge plasma actuator (SDBD-PA) on an airfoil belonging to a section of a locally developed wind turbine. The numerical results of the surface pressure distribution over the airfoil were compared with the experimental measurements carried out by the authors on the same blade section, and good agreement was found between numerical and experimental data for both plasma-OFF and plasma-ON cases. An in-depth parametric numerical investigation was then carried out to provide a better understanding of the flow behavior affected by the activation of PA over the same airfoil at post stall angle of attacks (AOAs). According to the results, the frequency and voltage of actuation, AOA, and free stream velocity are shown to have strong impacts on separation delay and actuation effectiveness. In Reynolds number of 2.85 × 105, the maximum PA effectiveness takes place at 21° which is approximately 312%, 307%, and 256% corresponding to the PA location of LE, 0.02 chord, and 0.15 chord, respectively. Also, maximum velocity of the domain is increased three times of the free stream velocity on average for three investigated Reynolds numbers at the frequency and voltage of 12 kHz and 12 kV, respectively. Furthermore, the size of the wake area noticeably contracts due to the presence of the SDBD-PA. The results clearly indicate that the lift and drag coefficients as well as the lift-to-drag ratio fit a linear variation pattern with the frequency of actuation. The variation rate of the aforementioned parameters becomes steeper as the peak voltage of actuation increases. Highly nonlinear aerodynamic responses and significant interactions were demonstrated between the investigated parameters.

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A triangular vortex generator modeling on a DU97-W-300 airfoil by a source term model

Cited by 9 publications

References 40 publications

Numerical Assessment of a BAY-Type Model for different Vortex Generator Shapes Applied on a Wind Turbine Airfoil

Numerical Assessment of a BAY-Type Model for different Vortex Generator Shapes Applied on a Wind Turbine Airfoil

Aplikazio biomimetikoak itsas energien atzemate-gailuetan

Enhancement of a horizontal axis wind turbine airfoil performance using single dielectric barrier discharge plasma actuator

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