The DAN-AERO MW Experiments

Madsen, Helge Aagaard; Bak, Christian; Paulsen, Uwe Schmidt; Gaunaa, Mac; Sørensen, Niels N.; Fuglsang, P.; Romblad, Jonas; Niels, A; Olsen,; Enevoldsen, P.; Laursen, Jannie; Jensen, Lotte

doi:10.2514/6.2010-645

Cited by 83 publications

(96 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The two-dimensional aerofoil data have been corrected to account for three-dimensional effects. The NM80 turbine is proprietary to Vestas Wind Systems A/S, but reference is made to the DAN-AERO MW Experiments [49].…”

Section: Dynamic Wake Characterizationmentioning

confidence: 99%

Simulation of wind turbine wakes using the actuator line technique

Sørensen

Mikkelsen

Henningson

et al. 2015

Phil. Trans. R. Soc. A.

156

158

View full text Add to dashboard Cite

The actuator line technique was introduced as a numerical tool to be employed in combination with large eddy simulations to enable the study of wakes and wake interaction in wind farms. The technique is today largely used for studying basic features of wakes as well as for making performance predictions of wind farms. In this paper, we give a short introduction to the wake problem and the actuator line methodology and present a study in which the technique is employed to determine the near-wake properties of wind turbines. The presented results include a comparison of experimental results of the wake characteristics of the flow around a three-bladed model wind turbine, the development of a simple analytical formula for determining the near-wake length behind a wind turbine and a detailed investigation of wake structures based on proper orthogonal decomposition analysis of numerically generated snapshots of the wake.

show abstract

Section: Dynamic Wake Characterizationmentioning

confidence: 99%

Simulation of wind turbine wakes using the actuator line technique

Sørensen

Mikkelsen

Henningson

et al. 2015

Phil. Trans. R. Soc. A.

156

158

View full text Add to dashboard Cite

show abstract

“…The turbine is the NM80 turbine, proprietary to Vestas Wind Systems A/S, see Madsen et al [16]. The employed version of the NM80 is rated to 2.75MW at U hub = 14m/s and with R = 40m.…”

Section: Methodsmentioning

confidence: 99%

Instantaneous Response and Mutual Interaction between Wind Turbine and Flow

Andersen¹,

Sørensen²

2018

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Abstract. The mutual fluid-structure interaction between wind turbine(s) and the highly turbulent flow deep inside a large wind farm is investigated in order to elucidate on how to implement and perform dynamic wind farm control. The study employs a fully coupled LES and aeroelastic framework, which provide time resolved flow and turbine response governed by a controller. The results show a large correlation between incoming flow and turbine response, which extends several radii upstream and could be utilized for turbine control by e.g. installing a lidar on top of the wind turbine. Similarly, the results are valuable for utilizing nacelle mounted lidars for power curve assessments in large wind farms. However, the correlations between turbine and wake flow as well as the dynamic wake position are low, which is potentially discouraging for attempts to do instantaneous yaw steering.

show abstract

“…The measurement data of the 3.6 MW Siemens turbine stems from the DANAERO project -2009(Aagaard Madsen et al, 2010a. The turbine was located at the Høvsøre test site for large wind turbines in Denmark and equipped with a five-hole CPSPY5 Aeroprobe pitot tube at the 36 m radius of one of its 53.5 m blades.…”

Section: Turbine and Sitementioning

confidence: 99%

“…The turbine model used for the simulations is based on the structural and aerodynamic configuration of the Siemens 3.6 MW turbine, which was tested at Høvsøre in 2009 during the DANAERO project (Aagaard Madsen et al, 2010a), i.e. a model of the turbine in the full-scale measurement study in Sect.…”

Section: Numerical Studymentioning

confidence: 99%

Using wind speed from a blade-mounted flow sensor for power and load assessment on modern wind turbines

et al. 2017

View full text Add to dashboard Cite

Abstract.In this paper an alternative method to evaluate power performance and loads on wind turbines using a blade-mounted flow sensor is investigated. The hypothesis is that the wind speed measured at the blades has a high correlation with the power and loads such that a power or load assessment can be performed from a few hours or days of measurements.In the present study a blade-mounted five-hole pitot tube is used as the flow sensor as an alternative to the conventional approach, where the reference wind speed is either measured at a nearby met mast or on the nacelle using lidar technology or cup anemometers. From the flow sensor measurements, an accurate estimate of the wind speed at the rotor plane can be obtained. This wind speed is disturbed by the presence of the wind turbine, and it is therefore different from the free-flow wind speed. However, the recorded wind speed has a high correlation with the actual power production as well as the flap-wise loads as it is measured close to the blade where the aerodynamic forces are acting.Conventional power curves are based on at least 180 h of 10 min mean values, but using the blade-mounted flow sensor both the observation average time and the overall assessment time can potentially be shortened. The basis for this hypothesis is that the sensor is able to provide more observations with higher accuracy, as the sensor follows the rotation of the rotor and because of the high correlation between the flow at the blades and the power production. This is the research question addressed in this paper.The method is first tested using aeroelastic simulations where the dependence of the radial position and effect of multiple blade-mounted flow sensors are also investigated. Next the method is evaluated on the basis of fullscale measurements on a pitch-regulated, variable-speed 3.6 MW wind turbine.It is concluded that the wind speed derived from the blade-mounted flow sensor is highly correlated with the power and flap-wise bending moment and that the method has advantages over the traditional approach where the met-mast wind speed is used as reference, e.g. the capability of measuring the shear, veer and turbulence. The aeroelastic simulations show that the assessment time can be reduced, but this reduction cannot be confirmed from the current measurement database due to sensor problems and practical circumstances. Measuring the wind speed at the rotor plane comes with a price as the wind speed is affected by the induction which may be sensitive to the changes you want to evaluate, e.g. different vortex generator configurations. Furthermore it is concluded that a robust instrument and measurement system is required to obtain accurate and reliable wind speed recordings from pitot-tube measurements.Published by Copernicus Publications on behalf of the European Academy of Wind Energy e.V.

show abstract

The DAN-AERO MW Experiments

Cited by 83 publications

References 2 publications

Simulation of wind turbine wakes using the actuator line technique

Simulation of wind turbine wakes using the actuator line technique

Instantaneous Response and Mutual Interaction between Wind Turbine and Flow

Using wind speed from a blade-mounted flow sensor for power and load assessment on modern wind turbines

Contact Info

Product

Resources

About