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Assessment of stress-blended eddy simulation model for accurate performance prediction of vertical axis wind turbine

Syawitri, Taurista Perdana; Yao, Yufeng; Yao, Jun; Chandra, Budi

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Authors

Taurista Perdana Syawitri

Yufeng Yao Yufeng.Yao@uwe.ac.uk
Professor in Aerospace Engineering

Budi Chandra Budi.Chandra@uwe.ac.uk
Senior Lecturer in Aerospace Engineering



Abstract

Abstract
Purpose
The aim of this paper is to assess the ability of a stress-blended eddy simulation (SBES) turbulence model to predict the performance of a three-straight-bladed vertical axis wind turbine (VAWT). The grid sensitivity study is conducted to evaluate the simulation accuracy.

Design/methodology/approach
The unsteady Reynolds-averaged Navier–Stokes equations are solved using the computational fluid dynamics (CFD) technique. Two types of grid topology around the blades, namely, O-grid (OG) and C-grid (CG) types, are considered for grid sensitivity studies.

Findings
With regard to the power coefficient (Cp), simulation results have shown significant improvements of predictions using compared to other turbulence models such as the k-e model. The Cp distributions predicted by applying the CG mesh are in good agreement with the experimental data than that by the OG mesh.

Research limitations/implications
The current study provides some new insights of the use of SBES turbulence model in VAWT CFD simulations.

Practical implications
The SBES turbulence model can significantly improve the numerical accuracy on predicting the VAWT performance at a lower tip speed ratio (TSR), which other turbulence models cannot achieve. Furthermore, it has less computational demand for the finer grid resolution used in the RANS-Large Eddy Simulation (LES) “transition” zone compared to other hybrid RANS-LES models.

Originality/value
To authors’ knowledge, this is the first attempt to apply SBES turbulence model to predict VAWT performance resulting for accurate CFD results. The better prediction can increase the credibility of computational evaluation of a new or an improved configuration of VAWT.

Citation

Syawitri, T. P., Yao, Y., Yao, J., & Chandra, B. (2021). Assessment of stress-blended eddy simulation model for accurate performance prediction of vertical axis wind turbine. International Journal of Numerical Methods for Heat and Fluid Flow, 31(2), 655-673. https://doi.org/10.1108/hff-09-2019-0689

Journal Article Type Article
Acceptance Date Feb 27, 2020
Online Publication Date Jun 18, 2020
Publication Date Feb 1, 2021
Deposit Date Jun 22, 2020
Publicly Available Date Jun 23, 2020
Journal International Journal of Numerical Methods for Heat & Fluid Flow
Print ISSN 0961-5539
Electronic ISSN 0961-5539
Publisher Emerald
Peer Reviewed Peer Reviewed
Volume 31
Issue 2
Pages 655-673
DOI https://doi.org/10.1108/hff-09-2019-0689
Keywords Vertical axis wind turbine; grid topology sensitivity; stress-blended eddy simulation
Public URL https://uwe-repository.worktribe.com/output/6051289
Publisher URL https://www.emerald.com/insight/content/doi/10.1108/HFF-09-2019-0689/full/html

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