An aerodynamic analysis of a novel small wind turbine based on impulse turbine principles

RENEWABLE ENERGY

卷:75

Article

Ying, Pei¹  Chen, Yong Kang¹  Xu, Yi Geng¹ 

[1] Univ Hertfordshire, Sch Engn & Technol, Hatfield AL10 9AB, Herts, England

关键词: Wind energy;    CFD;    Wind tunnel test;    Impulse wind turbine;    Power coefficient;   

DOI  :  10.1016/j.renene.2014.09.035

来源: Elsevier

【 摘 要 】

The paper presents both a numerical and an experimental approach to study the air flow characteristics of a novel small wind turbine and to predict its performance. The turbine model was generated based on impulse turbine principles in order to be employed in an omni-flow wind energy system in urban areas. The results have shown that the maximum flow velocity behind the stator can be increased by 20% because of a nozzle cascade from the stator geometry. It was also observed that a wind turbine with a 0.3 m rotor diameter achieved the maximum power coefficient of 0.17 at the tip speed ratio of 0.6 under the wind velocity of 8.2 m/s. It was also found that the power coefficient was linked to the hub-to-tip ratio and reached its maximum value when the hub-to-tip ratio was 0.45. It is evident that this new wind turbine has the potential for low working noise and good starting feature compared with a conventional horizontal axis wind turbine. (C) 2014 Elsevier Ltd. All rights reserved.

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