Open AccessAn extended actuator cylinder model: Actuator‐in‐actuator cylinder (AC‐squared) model
Author(s) -
De Tavernier Delphine,
Ferreira Carlos
Publication year - 2019
Publication title -
wind energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.743
H-Index - 92
eISSN - 1099-1824
pISSN - 1095-4244
DOI - 10.1002/we.2340
Subject(s) - actuator , cylinder , control theory (sociology) , mechanics , engineering , physics , mechanical engineering , computer science , control (management) , artificial intelligence , electrical engineering
In this paper, the actuator‐in‐actuator cylinder (AC‐squared) model is presented. This model is an extension of the original actuator cylinder model of Madsen and is capable of modelling the effect of a two concentric actuation surfaces in 2D. The induced velocity at every point in the 2D field is affected by the force field acting on the two actuator cylinders. The equations are derived, and a model verification is performed using analytical solutions of flows, proof of flow equivalence, and using OpenFOAM calculations. Finally, the model is applied to different case studies, and the results are compared with a time‐dependent free wake vortex method.