Lagrangian Vortex computations of turbine wakes: recent improvements using Poletto’s Synthetic Eddy Method (SEM) to account for ambient turbulence

Type Article
Date 2020-09
Language English
Author(s) Choma Bex Camille1, 2, Pinon Gregory1, Slama Myriam1, Gaston Benoist3, Germain GregoryORCID2, Rivoalen Elie1, 4
Affiliation(s) 1 : LOMC, Laboratoire Ondes et Milieux Complexes, Normandie Univ, UNIHAVRE, CNRS, LOMC, 76600 Le Havre, France
2 : IFREMER, Marine Structures Laboratory, 150 quai Gambetta, 62200 Boulogne-sur-mer, France
3 : CRIANN, Centre Régional Informatique et d'Applications Numériques de Normandie, 76800 Saint-étienne-du-Rouvray, France
4 : LMN, Laboratoire de Mécanique de Normandie, Normandie Univ, INSA Rouen, LMN, 76000 Rouen, France
Source Journal of Physics: Conference Series (1742-6588) (IOP Publishing), 2020-09 , Vol. 1618 , P. 062028 (9p.)
DOI 10.1088/1742-6596/1618/6/062028
Abstract

This paper presents possible techniques for modelling ambient turbulence in the Lagrangian Vortex Method formalism. Due to the fact that regular Synthetic Eddy Method (SEM) already presented in previous studies is not divergence free by definition; improvements were necessary to develop a similar SEM method with such a divergence free property. The recent improvements formulated by R. Poletto give the way to such a possibility. This new Divergence Free Synthetic Eddy Method (DFSEM) is presented here in comparison with the regular SEM. Obtained numerical velocity fields are compared in terms of convergence properties, Power Spectral Density and also Taylor macro-scale. Finally, turbine wakes are computed with both the recent Poletto's DFSEM and the regular Jarrin's SEM to highlight differences. At this stage of development, the DFSEM seems very promising even though some improvements are still necessary.

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Choma Bex Camille, Pinon Gregory, Slama Myriam, Gaston Benoist, Germain Gregory, Rivoalen Elie (2020). Lagrangian Vortex computations of turbine wakes: recent improvements using Poletto’s Synthetic Eddy Method (SEM) to account for ambient turbulence. Journal of Physics: Conference Series, 1618, 062028 (9p.). Publisher's official version : https://doi.org/10.1088/1742-6596/1618/6/062028 , Open Access version : https://archimer.ifremer.fr/doc/00652/76443/