NDLI: Effect of aspect ratio on vertical-axis wind turbine wakes

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Effect of aspect ratio on vertical-axis wind turbine wakes

Content Provider	Scilit
Author	Shamsoddin, Sina Porté-Agel, Fernando
Copyright Year	2020
Description	Variability of the rotor aspect ratio is one of the inherent characteristics of vertical-axis wind turbines (VAWTs) which differentiates them especially from the more conventional horizontal-axis wind turbines. In this study, we intend to investigate the effect of rotor aspect ratio on VAWT wakes. In particular, we aim to find out whether a common behaviour exists in the mean flow field of such wakes. In order to do so, we first design and perform a set of numerical experiments (using our already validated large-eddy simulation framework) to obtain the mean flow field of the wakes of three VAWTs of different aspect ratio (2, 1 and , we obtain a remarkable collapse of the wake profiles for the three aspect ratios. As a corollary, cross-sections of wakes of turbines with different aspect ratios eventually converge to a circular shape – not an elliptical one, for example, as one might presume intuitively. This result influences the modelling of VAWT far wakes and, in turn, has implications on the optimal configuration of VAWT farms.
Related Links	https://www.cambridge.org/core/services/aop-cambridge-core/content/view/0EC9E62E50EF9A1E348710B611CC500A/S0022112020000932a.pdf/div-class-title-effect-of-aspect-ratio-on-vertical-axis-wind-turbine-wakes-div.pdf
ISSN	00221120
e-ISSN	14697645
DOI	10.1017/jfm.2020.93
Journal	Journal of Fluid Mechanics
Volume Number	889
Language	English
Publisher	Cambridge University Press (CUP)
Publisher Date	2020-04-25
Access Restriction	Open
Subject Keyword	Journal of Fluid Mechanics Fluids and Plasmas Physics Turbulent Flows General Fluid Mechanics
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Mechanics of Materials Condensed Matter Physics Mechanical Engineering

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