Simulation and Analysis of Wind Turbine Wakes

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Abstract

Modern wind turbines are often clustered in wind farms in which the turbines are fully or partially influenced by the wake of upstream located turbines. As a consequence, the wake behind the wind turbines has a lower mean wind speed and an increased turbulence level, as compared to the undisturbed flow outside the farm. Hence, wake interaction leads to a decreased total production of power, caused by lower kinetic energy in the wind, and an increase in the turbulence intensity. The turbulence created from wind turbine wakes is mainly due to the presence of the distinct tip and root vortices, which eventually break down and forms small-scale turbulent structures. If a wind turbine is located in a wake consisting of tip and root vortices, the fatigue loading is more severe than in the case where the tip vortices have already broken down by instability mechanisms. Therefore, understanding the physical nature of the vortices and their dynamics in the wake of a turbine is important for the optimal design of a wind farm.
Original languageEnglish
Title of host publicationProceedings of the 30th Nordic Seminar on Computational Mechanics (NSCM-30)
EditorsJ. Høsberg, N.L. Pedersen
Number of pages1
Publication date2017
Pages20
Publication statusPublished - 2017
Event30th Nordic Seminar on Computational Mechanics (NSCM-30) - Copenhagen
Duration: 25 Oct 201727 Oct 2017

Conference

Conference30th Nordic Seminar on Computational Mechanics (NSCM-30)
CityCopenhagen
Period25/10/201727/10/2017

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