Experimental study of turbulence intensity on the wake characteristics of a horizontal-axis wind turbine

Han, Yuxia; Wang, Jianwen; Li, Xin; Jin, Kaining; Yang, Bin; Dong, Xueqing; Wen, Caifeng

doi:10.1080/15567036.2022.2128939

Cited by 3 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned previously, this simulation needs to reproduce as well as possible the base flow, such that the differences observed in the wake can be mostly attributed to the wind turbine modelling. As found in [7], the turbulence characteristics of the inflow have a significant impact on the flow recovery within the wind turbine wake. For this reason, a large effort has been put on also reproducing correctly the fluctuations.…”

Section: Data Assimilation and Control Of The Turbulent Characteristicsmentioning

confidence: 82%

Wind tunnel inflow data assimilation in an LES digital twin for improving validation against an experimental wind turbine wake

Gillyns,

Buckingham,

Van Beeck

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Wind energy is playing an essential role in the energy transition towards a carbon-neutral system, for which wind turbine wakes are one of the most important aspects. By extracting energy from the flow, the turbine generates power but also decreases the production and increases the loading of downstream wind turbines; and potentially affects nearby structures. To better understand the physical phenomenon, Large Eddy Simulation (LES) offers scale-resolving capabilities and a physical insight into complex turbulence flows. The state of the art in terms of high-fidelity wake simulations consists in combining LES with an Actuator Line Model in order to capture the tip vortices and detailed wake dynamics. This paper focuses on the comparison between such simulation, with experiments in the controlled environment of a wind tunnel, in order to assess the performance and limitations of the model. A large part is dedicated to reproducing a developing flow, with a controlled level of turbulence. The Recycle and Rescale Method is used to provide the mean inflow profile, while a novel approach using controlled volume forces allows to improve the turbulence level of the flow. With the proposed methodology, the mean profile is properly imposed, while the associated turbulence characteristics is improved by roughly 50 %.

show abstract

Section: Data Assimilation and Control Of The Turbulent Characteristicsmentioning

confidence: 82%

Wind tunnel inflow data assimilation in an LES digital twin for improving validation against an experimental wind turbine wake

Gillyns,

Buckingham,

Van Beeck

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…However, with the increase in the number of wind turbines in the wind field, the wind speed characteristics of the original flow have varying degrees of influence on the power output of the wind turbine and the dynamic change of the wake flow field, and the problems of the wind turbine caused are beginning to be highlighted, so the research on the wind characteristics of the incoming flow is particularly important. Therefore, many scholars have performed a lot of research on the influence of incoming flow on the power [1][2][3][4] and wake [5][6][7][8] of wind turbines. Wind data were measured for a 300-kW wind turbine using both a nacelle anemometer installed in it and a nine-beam nacelle LiDAR, and then compared.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Incoming Flow on Wind Turbine Power and Wake Based on Wavelet Analysis

Niu

Yang

Wang³

2023

Energies

View full text Add to dashboard Cite

Taking a wind farm in the Qinghai–Tibet Plateau as the experimental site, the ZephiR Dual Mode (ZDM) LiDAR and ground-based laser LiDAR were used to scan the incoming flow and wake of the wind turbine separately. Based on wavelet analysis, the experimental study was conducted on the influence of different incoming wind speeds on the power and wake of the wind turbine. It is found that the incoming wind speeds have a great influence on the wind turbine power, and the fluctuation frequency of the wind speed is obviously higher than that of the power, that is, the scale effects of turbulence are magnified. The rotation of the wind wheel can accelerate the collapse of the large-scale turbulent structures of the incoming flow, and large-scale vortices continue to collapse into small-scale vortices, that is, the energy cascade evolution occurs. And in the wake diffusion process, the dissipation degree of the upper blade tip vortex is greater than that of the lower blade tip vortex caused by the rotation of the wind turbine. Under the same incoming flow conditions, due to the influence of tower and ground turbulence structure, the energy level connection phenomenon of the measuring points below the hub height is stronger than that above the hub height, and it weakens with the increase of the measuring distance. That is, the energy cascade of the measuring points below the hub height at 1.5 D (D is the diameter of the wind wheel) of the wake is weaker than that at 1 D of the wake. With the increase of the measuring distance of the wake, the influx of the external flow field further aggravates the momentum exchange and energy transport between the vortex clusters, that is, the influence of the external flow field gradually increases in the wake vortex pulsation.

show abstract

Experimental investigation on Aeroelastic response of long flexible blades in turbulent flow

Wang,

Jiang,

Amjad

et al. 2024

Applied Energy

View full text Add to dashboard Cite

Experimental study of turbulence intensity on the wake characteristics of a horizontal-axis wind turbine

Cited by 3 publications

References 24 publications

Wind tunnel inflow data assimilation in an LES digital twin for improving validation against an experimental wind turbine wake

Wind tunnel inflow data assimilation in an LES digital twin for improving validation against an experimental wind turbine wake

Experimental Study on the Influence of Incoming Flow on Wind Turbine Power and Wake Based on Wavelet Analysis

Experimental investigation on Aeroelastic response of long flexible blades in turbulent flow

Contact Info

Product

Resources

About