A code-independent generalized actuator line model for wind farm aerodynamics over simple and complex terrain

Rai, Raj K.; Gopalan, Harish; Sitaraman, Jayanarayanan; Mirocha, Jeffrey D.; Miller, Wayne O.

doi:10.1016/j.envsoft.2017.05.001

Title: A code-independent generalized actuator line model for wind farm aerodynamics over simple and complex terrain

Journal Article · Tue Aug 01 00:00:00 EDT 2017 · Environmental Modelling and Software

DOI:https://doi.org/10.1016/j.envsoft.2017.05.001· OSTI ID:1810649

Rai, Raj K. ^[1];

^[2]; Sitaraman, Jayanarayanan ^[1]; Mirocha, Jeffrey D. ^[3]; Miller, Wayne O. ^[3]

Univ. of Wyoming, Laramie, WY (United States)
Univ. of Wyoming, Laramie, WY (United States); Institute of High Performance Computing (Singapore)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Actuator line model representations of wind turbines reduce the simulation cost of wind farm aerodynamics relative to blade geometry resolving simulations. However, most implementations are code specific and may not have proper load balancing when run in parallel. Here, a generalized actuator line model (GALM) is developed to overcome this implementation drawback of existing approaches. The GALM can be coupled to any existing microscale solver with minimal or no modifications. The coupling of our GALM model with the open-source microscale code CgWind is used to demonstrate both its ease of use and fidelity. The results obtained from the coupled-model simulations are validated for both isolated turbine in wind tunnel experiments and measurements in offshore wind farm. Finally, an operational wind farm over complex terrain is demonstrated. The simulations show that wake meandering and power production are strongly influenced by terrain impacts. Access information for obtaining the code is provided.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1810649

Report Number(s):: LLNL-JRNL-793105; 992765

Journal Information:: Environmental Modelling and Software, Vol. 94, Issue na; ISSN 1364-8152

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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