4.7 Article

Assessment of icing effects on the wake shed behind a vertical axis wind turbine

Journal

PHYSICS OF FLUIDS
Volume 35, Issue 9, Pages -

Publisher

AIP Publishing
DOI: 10.1063/5.0169102

Keywords

-

Ask authors/readers for more resources

In this study, the effect of icing phenomenon on the wake characteristics of a vertical-axis wind turbine (VAWT) was investigated using high-fidelity computational fluid dynamics simulation. The results showed that icing caused the leading edge vortex and trailing edge vortex to separate faster, resulting in a steeper drop in the power coefficient. The modes of the transversal component of velocity in clean and icy conditions were found to be more similar, while the modes of the streamwise component showed significant differences.
To shed light on the effect of the icing phenomenon on the vertical-axis wind turbine (VAWT) wake characteristics, we present a high-fidelity computational fluid dynamics simulation of the flow field of H-Darrieus turbine under the icing conditions. To address continuous geometry alteration due to the icing and predefined motion of the VAWT, a pseudo-steady approach proposed by Baizhuma et al. [Numerical method to predict ice accretion shapes and performance penalties for rotating vertical axis wind turbines under icing conditions, J. Wind Eng. Ind. Aerodyn. 216, 104708 (2021)] was implemented, which enables the utilization of appropriate approaches for handling turbine rotation and turbulence prediction for each solver. Proper orthogonal decomposition (POD) was utilized to perform a deep analysis of the wake and aerodynamics of the wind turbine for the clean and iced turbines with large eddy simulation turbulence method. Icing causes the leading edge vortex and trailing edge vortex to separate faster than the clean case resulting in a steeper drop in the power coefficient. As for POD modes, those of the streamwise component of velocity illustrated more difference in the amount of modal energy especially at the first modes proving that the icing phenomenon mainly affects the vortex shedding of the flow structures with larger energy and size. The modes of the transversal component of velocity of the clean and iced cases demonstrated more similarity in essence, which could also be understood from the accumulated energy curve.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available