2018
DOI: 10.5194/wes-3-439-2018
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About the suitability of different numerical methods to reproduce model wind turbine measurements in a wind tunnel with a high blockage ratio

Abstract: Abstract. In the present paper, numerical and experimental investigations of a model wind turbine with a diameter of 3.0 m are described. The study has three objectives. The first one is the provision of validation data. The second one is to estimate the influence of the wind tunnel walls by comparing measurements to simulated results with and without wind tunnel walls. The last objective is the comparison and evaluation of methods of high fidelity, namely computational fluid dynamics, and medium fidelity, nam… Show more

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Cited by 16 publications
(23 citation statements)
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“…At rated conditions and considering the horizontal blade position, φ = 270°, the AoA of the baseline case amount to αZZ = 8.8°, see Figure 8. This outcome is in agreement with comparable investigations in the mid-span region based on 3-hole probes as well as URANS simulations, as detailed by Klein et al (2018). Furthermore, Figure 8 displays the consistent AoA-decrease caused by the GF configurations.…”
Section: Wake Velocities and Angles-of-attacksupporting
confidence: 91%
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“…At rated conditions and considering the horizontal blade position, φ = 270°, the AoA of the baseline case amount to αZZ = 8.8°, see Figure 8. This outcome is in agreement with comparable investigations in the mid-span region based on 3-hole probes as well as URANS simulations, as detailed by Klein et al (2018). Furthermore, Figure 8 displays the consistent AoA-decrease caused by the GF configurations.…”
Section: Wake Velocities and Angles-of-attacksupporting
confidence: 91%
“…This phenomenon is caused by the wind tunnel blockage effects, as shown via URANS simulations using the fluid dynamic code FLOWer. At rated conditions of the BeRT, Klein et al (2018) predict that the flow decelerates to an axial wake velocity in the range of 0.62 u∞ < uCFD < 0.77u∞, which is in agreement with the experimental results, uEXP = 0.69u∞. Furthermore, the corresponding tangential velocity is similar to the steady state BEM simulation of QBlade (Marten et al, 2013) based on the XFOIL settings (Sect.…”
Section: Wake Velocities and Angles-of-attacksupporting
confidence: 84%
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“…Following Klein et al (2018), the principal baseline configuration of the BeRT includes zigzag (ZZ) turbulator tape: in short, the tripped case. ZZ tape is applied in order to initiate the laminar-to-turbulent transition of the boundary layer (BL) at a fixed location.…”
Section: Forced Transitionmentioning
confidence: 99%
“…The design of the DTU 10 MW reference wind turbine includes smooth wedge-shaped GFs in the first half of the blade length, 0.05R < r < 0.4R, using GF heights in the range of 1.3 %c < GF < 3.5 %c (Bak et al, 2013). Figure 2b illustrates the changes in the flow field of the laminar airfoil HQ17 when implementing different GF heights, as reported by Liebeck (1978) by means of the Newman airfoil. Key to the aerodynamic understanding is the development of one vortex upstream and two counterrotat- ing vortices downstream of the GF, as such entailing a lowpressure region in the TE wake.…”
Section: Introductionmentioning
confidence: 99%