Impact of different forest densities on atmospheric boundary-layer development and wind-turbine wake
Adedipe, Taiwo A.; Chaudhari, Ashvinkumar; Kauranne, Tuomo (2020-01-15)
Post-print / Final draft
Adedipe, Taiwo A.
Chaudhari, Ashvinkumar
Kauranne, Tuomo
15.01.2020
Wind Energy
John Wiley & Sons Ltd
School of Engineering Science
Kaikki oikeudet pidätetään.
© 2020 John Wiley & Sons, Ltd.
© 2020 John Wiley & Sons, Ltd.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe202001223087
https://urn.fi/URN:NBN:fi-fe202001223087
Tiivistelmä
The aim of this work is to investigate the atmospheric boundary‐layer (ABL) flow and the wind turbine wake over forests with varying leaf area densities (LAD). The forest LAD profile used in this study is based on a real forest site, Ryningsnäs, located in Sweden. The reference turbine used to model the wake is a well‐documented 5‐MW turbine, which is implemented in the simulations using an actuator line model (ALM). All simulations are carried out with openFOAM using the Reynolds averaged Navier‐Stokes (RANS) approach. Twelve forest cases with leaf area index (LAI) ranging from 0.42 to 8.5 are considered. Results show that the mean velocity decreases with increasing LAI within the forest canopy, but increases with LAI above the hub height. Meanwhile, the turbulent kinetic energy (TKE) varies nonmonotonically with forest density. The TKE increases with forest density and reaches to its maximum at an average LAI of 1.70, afterwards, it decreases gradually as the density increases. It is also observed that the forest density has a clear role in the wake development and recovery. Comparisons between no‐forest and forest cases show that the forest characteristics help in damping the added turbulence from the turbine. As a consequence, the forest with the highest upstream turbulence has the shortest wake downstream of the turbine.
Lähdeviite
Adedipe, T.A., Chaudhari, A., Kauranne, T. (2020). Impact of different forest densities on atmospheric boundary-layer development and wind-turbine wake. Wind Energy. DOI: 10.1002/we.2464
Alkuperäinen verkko-osoite
https://onlinelibrary.wiley.com/doi/abs/10.1002/we.2464Kokoelmat
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