Numerical Study of the Impact of Atmospheric Stratification on a Wind-Turbine Performance

Wake Conference 2017

Chaudhari, A.^1 ; Agafonova, O.^1 ; Hellsten, A.^1,2 ; Sorvari, J.^1

CEID, School of Engineering Science, Lappeenranta University of Technology, P.O. Box 20, Lappeenranta

53851, Finland^1

Finnish Meteorological Institute, P.O. Box 503, Helsinki

00101, Finland^2

关键词: Atmospheric conditions;    Atmospheric stratification;    Line models;    Low level jet;    Neutral conditions;    Numerical results;    Turbine performance;    Wind turbine wakes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/854/1/012007/pdf
DOI  :  10.1088/1742-6596/854/1/012007

来源: IOP

【 摘 要 】

This paper is aimed to obtain a better understanding of how a stably stratified atmospheric condition involving low-level jet, in comparison to neutral condition, affects to a wind-turbine performance. In this work, large-eddy simulation approach in combination with actuator-line model is used to simulate the wake flows in an infinitely long wind farm. Here, numerical simulations of the wind-turbine wakes are carried out under the influence of neutral and stable conditions. The numerical results are compared between the two atmospheric conditions. It has been seen that the wind-turbine performance is highly influenced under the stable conditions. For an infinitely long wind-farm scenario, the power produced by a turbine under the stable condition is smaller by 81% than that under the neutral condition.