NDLI: Parametric and Comparative Assessment of Navier-Stokes CFD Methodologies for Darrieus Wind Turbine Performance Analysis

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Balduzzi, Francesco Bianchini, Alessandro Gigante, Fabio Antonio Ferrara, Giovanni Campobasso, Michele Sergio Ferrari, Lorenzo
Copyright Year	2015
Abstract	Navier-Stokes computational fluid dynamics simulations are expected to provide the basis for a deeper understanding of the real behavior of vertical-axis wind turbines. The prediction of the flow field past Darrieus rotors, a popular turbine of this type, requires a good resolution of both the unsteadiness caused by the periodic variation of the modulus and direction of the relative velocity perceived by the blades, and the interaction between the wakes shed by the blades in the upstream region of the rotor and the downstream blades traveling through such wakes. This paper presents a comparative assessment of the predictive capabilities of two substantially different time-dependent Navier-Stokes Reynolds-averaged-based approaches to the analysis of Darrieus turbines. One is based on a commercial code, and the other on an academic research code. A Darrieus rotor configuration previously analyzed by other researchers was selected for this study, which focused on the turbine flow at a tip-speed ratio of 3.3. Aggregate power coefficient comparisons at other regimes are also provided. Solution sensitivity analyses to spatial and temporal grid refinement, domain size and boundary condition modeling aspects for each of the two approaches are provided in the study. A very good agreement is obtained between the two simulation sets, and a fairly good agreement is found between both simulations and available measured data.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791856802
DOI	10.1115/GT2015-42663
Volume Number	Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy
Conference Proceedings	ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
Language	English
Publisher Date	2015-06-15
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Sensitivity analysis Computational fluid dynamics Blades Rotors Flow (dynamics) Modeling Simulation Vertical axis wind turbines Wakes Boundary-value problems Wind turbines Resolution (optics) Turbines
Content Type	Text
Resource Type	Article

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