A 2D numerical simulation of blade twist effect on the aerodynamic performance of an asymmetric blade vertical axis wind turbine in low wind speed

Hussain  Mazarbhuiya; Agnimitra Biswas; Kaushal Sharma

Research Article

A 2D numerical simulation of blade twist effect on the aerodynamic performance of an asymmetric blade vertical axis wind turbine in low wind speed

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@ARTICLE{10.4108/eai.13-7-2018.162828,
    author={Hussain  Mahamed Sahed Mostafa Mazarbhuiya and Agnimitra Biswas and Kaushal Kumar Sharma},
    title={A 2D numerical simulation of blade twist effect on the aerodynamic performance of an asymmetric blade vertical axis wind turbine in low wind speed},
    journal={EAI Endorsed Transactions on Energy Web: Online First},
    volume={},
    number={},
    publisher={EAI},
    journal_a={EW},
    year={2020},
    month={1},
    keywords={blade aerodynamics, blade twist, CFD, low wind speed, built environment},
    doi={10.4108/eai.13-7-2018.162828}
}

Hussain Mahamed Sahed Mostafa Mazarbhuiya
Agnimitra Biswas
Kaushal Kumar Sharma
Year: 2020
A 2D numerical simulation of blade twist effect on the aerodynamic performance of an asymmetric blade vertical axis wind turbine in low wind speed
EW
EAI
DOI: 10.4108/eai.13-7-2018.162828

Hussain Mahamed Sahed Mostafa Mazarbhuiya¹^,*, Agnimitra Biswas¹, Kaushal Kumar Sharma¹

1: Mechanical Engineering Department, National Institute of Technology, Silchar, Assam, India-788010

*Contact email: mdhussain0309@gmail.com

Abstract

For urban areas, small-scale vertical axis wind turbine (VAWT) is a promising energy harvester due to its compact structure. However, VAWT’s performance is inferior in low wind speed of urban environment. Selection of proper design and operational parameters can give a desirable power output under such condition. In this paper, effect of trailing edge blade twist on aerodynamic performance of an asymmetric blade H-Darrieus VAWT at a wind speed (6.0 m/s) is investigated using 2D numerical simulation. Important aerodynamic parameters considering blade twists have been analysed. Although blade twist has not increased power coefficient magnificently, the same is improved with blade twist of 1º. However, further increase of the latter reduces the turbine performance. A maximum power coefficient of 0.171 is obtained at tip speed ratio 2.4 for 1º blade twist configuration. Hence, the present study shows that blade twist should be very low for low wind speed application of H-Darrieus VAWT.

Keywords: blade aerodynamics, blade twist, CFD, low wind speed, built environment

Received: 22nd Nov 2019
Accepted: 20th Jan 2020
Published: 30th Jan 2020
Publisher: EAI

: http://dx.doi.org/10.4108/eai.13-7-2018.162828

Copyright © 2020 Hussain Mahamed Sahed Mostafa Mazarbhuiya et al., licensed to EAI. This is an open access article distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/3.0/), which permits unlimited use, distribution and reproduction in any medium so long as the original work is properly cited.