Wind turbine large-eddy simulations on very coarse grid resolutions using an actuator line model

Luis A. Martínez-Tossas, Richard J.A.M. Stevens, Charles Meneveau

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

5 Citations (Scopus)

Abstract

In this work the accuracy of the Actuator Line Model (ALM) in Large Eddy Simulations of wind turbine flow is studied under the specific conditions of very coarse spatial resolutions. For finely-resolved conditions, it is known that ALM provides better accuracy compared to the standard Actuator Disk Model (ADM) without rotation. However, we show here that on very coarse resolutions, flow induction occurring at rotor scales can affect the predicted in flow angle and can adversely affect the ALM predictions. We first provide an illustration of coarse LES to reproduce wind tunnel measurements. The resulting flow predictions are good, but the challenges in predicting power outputs from the detailed ALM motivate more detailed analysis on a case with uniform in flow. We present a theoretical framework to compare the filtered quantities that enter the Large-Eddy Simulation equations as body forces with a scaling relation between the filtered and un filtered quantities. The study aims to apply the theoretical derivation to the simulation framework and improve the current results for an ALM, especially in the near wake where the largest differences are observed.

Original languageEnglish
Title of host publication34th Wind Energy Symposium
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
Number of pages7
ISBN (Print)978-1-62410-395-7
DOIs
Publication statusPublished - 2016

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    Martínez-Tossas, L. A., Stevens, R. J. A. M., & Meneveau, C. (2016). Wind turbine large-eddy simulations on very coarse grid resolutions using an actuator line model. In 34th Wind Energy Symposium [160349] American Institute of Aeronautics and Astronautics Inc. (AIAA). https://doi.org/10.2514/6.2016-1261