Effect of Upstream Deflector Utilization on H-Darrieus Wind Turbine Performance: An Optimization Study

Iham F Zidane; Hesham Ali; Greg Swadener; Yehia Eldrainy; Ali Shehata

doi:10.1016/j.aej.2022.07.052

Effect of Upstream Deflector Utilization on H-Darrieus Wind Turbine Performance: An Optimization Study

Iham F Zidane, Hesham Ali, Greg Swadener^*, Yehia Eldrainy, Ali Shehata

^*Corresponding author for this work

Mechanical, Biomedical & Design Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

This paper aims to enhance the performance of H-Darrieus Vertical Axis Wind Turbine (VAWT) via introducing upstream deflectors. The impact of this addition has been investigated and discussed through different deflector configurations. The turbine performance before and after adding different wind rotor barriers was compared. A two dimensional, incompressible, transient, and turbulent flow model was built up in order to simulate the air flow around the turbine blades. Model verification and validation were performed through comparing the model solutions using different mesh sizes, time steps, turbulent models, and discretization schemes. Computational Fluid Dynamics (CFD) models were validated to provide novel insights on the effect of the deflectors on the aerodynamic characteristics of a VAWT blades. Results showed that the presence of a single deflector increases the highest value of the moment coefficient of the bare configuration by 24%, either increases the negative torque values, while two defectors increase the maximum value by 22% and the overall average value of the moment coefficient over the optimal range for the tip speed ratio.

Original language	English
Pages (from-to)	175-189
Journal	Alexandria Engineering Journal
Volume	63
Early online date	6 Aug 2022
DOIs	https://doi.org/10.1016/j.aej.2022.07.052 https://doi.org/10.1016/j.aej.2022.07.052
Publication status	Published - 1 Feb 2023

Bibliographical note

© 2022, The Authors. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Keywords

H-Darrieus
Vertical axis wind turbine
deflector
Aerodynamic performance
CFD

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I Zidane et al _Effect_of_Upstream_Deflector_Utilization_on_H_Darrius_Wind_Turbine_Performance
© 2022, The Authors. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/).
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Cite this

@article{d6ed1ffeebba40a0b5ddd0d7966992bf,

title = "Effect of Upstream Deflector Utilization on H-Darrieus Wind Turbine Performance: An Optimization Study",

abstract = "This paper aims to enhance the performance of H-Darrieus Vertical Axis Wind Turbine (VAWT) via introducing upstream deflectors. The impact of this addition has been investigated and discussed through different deflector configurations. The turbine performance before and after adding different wind rotor barriers was compared. A two dimensional, incompressible, transient, and turbulent flow model was built up in order to simulate the air flow around the turbine blades. Model verification and validation were performed through comparing the model solutions using different mesh sizes, time steps, turbulent models, and discretization schemes. Computational Fluid Dynamics (CFD) models were validated to provide novel insights on the effect of the deflectors on the aerodynamic characteristics of a VAWT blades. Results showed that the presence of a single deflector increases the highest value of the moment coefficient of the bare configuration by 24%, either increases the negative torque values, while two defectors increase the maximum value by 22% and the overall average value of the moment coefficient over the optimal range for the tip speed ratio.",

keywords = "H-Darrieus, Vertical axis wind turbine, deflector, Aerodynamic performance, CFD",

author = "Zidane, {Iham F} and Hesham Ali and Greg Swadener and Yehia Eldrainy and Ali Shehata",

note = "{\textcopyright} 2022, The Authors. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/).",

year = "2023",

month = feb,

day = "1",

doi = "10.1016/j.aej.2022.07.052",

language = "English",

volume = "63",

pages = "175--189",

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TY - JOUR

T1 - Effect of Upstream Deflector Utilization on H-Darrieus Wind Turbine Performance: An Optimization Study

AU - Zidane, Iham F

AU - Ali, Hesham

AU - Swadener, Greg

AU - Eldrainy, Yehia

AU - Shehata, Ali

N1 - © 2022, The Authors. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/).

PY - 2023/2/1

Y1 - 2023/2/1

N2 - This paper aims to enhance the performance of H-Darrieus Vertical Axis Wind Turbine (VAWT) via introducing upstream deflectors. The impact of this addition has been investigated and discussed through different deflector configurations. The turbine performance before and after adding different wind rotor barriers was compared. A two dimensional, incompressible, transient, and turbulent flow model was built up in order to simulate the air flow around the turbine blades. Model verification and validation were performed through comparing the model solutions using different mesh sizes, time steps, turbulent models, and discretization schemes. Computational Fluid Dynamics (CFD) models were validated to provide novel insights on the effect of the deflectors on the aerodynamic characteristics of a VAWT blades. Results showed that the presence of a single deflector increases the highest value of the moment coefficient of the bare configuration by 24%, either increases the negative torque values, while two defectors increase the maximum value by 22% and the overall average value of the moment coefficient over the optimal range for the tip speed ratio.

AB - This paper aims to enhance the performance of H-Darrieus Vertical Axis Wind Turbine (VAWT) via introducing upstream deflectors. The impact of this addition has been investigated and discussed through different deflector configurations. The turbine performance before and after adding different wind rotor barriers was compared. A two dimensional, incompressible, transient, and turbulent flow model was built up in order to simulate the air flow around the turbine blades. Model verification and validation were performed through comparing the model solutions using different mesh sizes, time steps, turbulent models, and discretization schemes. Computational Fluid Dynamics (CFD) models were validated to provide novel insights on the effect of the deflectors on the aerodynamic characteristics of a VAWT blades. Results showed that the presence of a single deflector increases the highest value of the moment coefficient of the bare configuration by 24%, either increases the negative torque values, while two defectors increase the maximum value by 22% and the overall average value of the moment coefficient over the optimal range for the tip speed ratio.

KW - H-Darrieus

KW - Vertical axis wind turbine

KW - deflector

KW - Aerodynamic performance

KW - CFD

UR - https://www.sciencedirect.com/science/article/pii/S1110016822005075

U2 - 10.1016/j.aej.2022.07.052

DO - 10.1016/j.aej.2022.07.052

M3 - Article

AN - SCOPUS:85135537048

SN - 1110-0168

VL - 63

SP - 175

EP - 189

JO - Alexandria Engineering Journal

JF - Alexandria Engineering Journal

ER -

Effect of Upstream Deflector Utilization on H-Darrieus Wind Turbine Performance: An Optimization Study

Abstract

Bibliographical note

Keywords

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