ew 20(28): e5

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},
        volume={7},
        number={28},
        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.