Effect of geometric parameters of Gurney flap on performance enhancement of straight-bladed vertical axis wind turbine
| Autor: | Chun Li, Wenxing Hao, Haitian Zhu, Shuai Luo, Qingsong Liu, Chuang Gao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Vertical axis wind turbine
Airfoil 060102 archaeology Renewable Energy Sustainability and the Environment business.industry 020209 energy Stall (fluid mechanics) Angular velocity 06 humanities and the arts 02 engineering and technology Aerodynamics Structural engineering 0202 electrical engineering electronic engineering information engineering Torque 0601 history and archaeology business Performance enhancement Gurney flap Geology |
| Zdroj: | Renewable Energy. 165:464-480 |
| ISSN: | 0960-1481 |
| DOI: | 10.1016/j.renene.2020.11.027 |
| Popis: | The enhancement of aerodynamic performance of airfoil using Gurney flap was demonstrated and due to its effects of lift increasing and stall suppression on airfoil, Gurney flap has positively functioned in a wide range of engineering. Though there had been numerous scholars who aroused wide concern on geometric parameters of Gurney flap for airfoil, the investigation of geometric design of Gurney flap for straight-bladed vertical axis wind turbine is absent. In current research, a comprehensive numerical study on the effect of geometric parameters of Gurney flap on performance enhancement of straight-bladed vertical axis wind turbine. Before a validation between numerical results and experimental data was carried out, a novel mathematical model of resistance torque of struts was put forward to increase the reliability of numerical model. The results show that the Gurney flap can remarkably promote the aerodynamic performance of vertical axis wind turbine with a decreased rotational velocity. The maximum improvement can reach up to 21.32%. In upstream area, Gurney flap can considerably increase the blade tangential force. Short-Gurney-flap blade can effective weaken the deficiency of aerodynamic loss in downstream area. The 0.75%-chord-length height is most appropriate for the straight-bladed vertical axis wind turbine in this paper. The aerodynamic load with Gurney flap is not sensitive to width. The design with 0.12%-chord-length width is the most suitable value through analyzing the power coefficient curve. |
| Databáze: | OpenAIRE |
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