A Simple Model for the Turbulence Intensity Distribution in Atmospheric Boundary Layers

L. C. Cheung, S. Premasuthan, S. Davoust, D. Von Terzi

Research output: Contribution to journalConference articleScientificpeer-review

3 Citations (Scopus)

Abstract

In the current work, we examine the distribution of turbulence intensity (TI) in simulations of atmospheric boundary layers (ABL) for wind turbine applications. We relate the turbulent fluctuations to the mean wind shear profile for neutrally stable ABL based on turbulent boundary layer theory. The results are then compared to corresponding LES data for various shear conditions. From this, a model for the TI distribution across a rotor disc is devised and calibrated. In addition, a second simpler version of the model is derived by assuming a power law for the velocity profile. The models are related to the Mann model and shown to have a similar scaling, however they are simpler and based on assumptions for turbulent boundary layers rather than homogeneous turbulence. The models are then tested for a range of stability conditions and shear values of the ABL including waked conditions from upstream wind turbines that stretch the assumptions made.

Original languageEnglish
Article number032008
JournalJournal of Physics: Conference Series
Volume753
Issue number3
DOIs
Publication statusPublished - 2016
Externally publishedYes
EventScience of Making Torque from Wind, TORQUE 2016 - Munich, Germany
Duration: 5 Oct 20167 Oct 2016

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