Effect of turbulence models on predicting HAWT rotor blade performances

You, Ju Yeol; Yu, Daren; Kwon, Oh Joon

doi:10.1007/s12206-013-0916-y

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…During the Phase VI of the experiment, a wind turbine was located inside the 24.4- × 36.6-m wind tunnel of the NASA Ames Research Center, and different tests were run for wind speeds ranging from 5 to 25 m/s (Hand et al ., 2001). The sequence S of the experimental campaign was broadly used for validation purposes (Gomez-Iradi et al ., 2009; Yelmule and Vsj, 2013; You et al ., 2013; Song and Perot, 2015), and hence, it is selected for the purposes of this work. During the S sequence, the tip pitch angle was set to 3 ° with respect to the rotor plane, the rotational speed to 72 rpm and the cone angle to 0 ° .…”

Section: The Nrel Phase VI Rotormentioning

confidence: 99%

“…A good agreement is obtained, except at 10 m/s, where an over-prediction is observed. Disagreement in blade loading between numerical predictions and experimental values for the 10 m/s case has been observed in previous computational fluid dyanamics studies (Gomez-Iradi et al ., 2009; Yelmule and Vsj, 2013; You et al ., 2013; Song and Perot, 2015). It must be emphasised that during the Phase VI campaign, total thrust and torque were estimated by surface integration of the obtained pressure measurements (110 pressure taps distributed among 5 span sections).…”

Section: The Nrel Phase VI Rotormentioning

confidence: 99%

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Streamwise vortex generator for separation reduction on wind turbine rotors

Suarez

Flaszyński

Doerffer

2018

HFF

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Purpose The purpose of this paper is to describe numerical investigations focused on the reduction of separation and the aerodynamic enhancement of wind turbine blades by a rod vortex generator (RVG). Design/methodology/approach A flow modelling approach through the use of a Reynolds-averaged Navier–Stokes solver is used. The numerical tools are validated with experimental data for the NREL Phase VI rotor and the S809 aerofoil. The effect of rod vortex generator’s (RVG) configuration on aerofoil aerodynamic performance, flow structure and separation is analysed. RVGs’ chordwise locations and spanwise distance are considered, and the optimum configuration of the RVG is applied to the wind turbine rotor. Findings Results show that streamwise vortices created by RVGs lead to modification of flow structure in boundary layer. As a result, the implementation of RVGs on aerofoil has proven to decrease the flow separation and enhance the aerodynamic performance of aerofoils. The effect on flow structure and aerodynamic performance has shown to be dependent on dimensions, chordwise location and spanwise distribution of rods. The implementation of devices with the optimum configuration has shown to increase aerodynamic performance and to significantly reduce separation for selected conditions. Application of rods to the wind turbine rotor has proven to avoid the spanwise penetration of flow separation where applied, leading to reduction of flow separation and to aerodynamic enhancement. Originality/value The proposed RVGs have shown potential to enhance the aerodynamic performance of wind turbine rotors and profiles, making devices an alternative solution to the classical vortex generators for wind turbine applications.

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