Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)
- Volume 5 Issue 4
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- Pages.13-20
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- 2006
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- 1598-6721(pISSN)
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- 2288-0771(eISSN)
Improving the Self-starting Performance of a VAWT
수직축 풍차의 자기동 성능 개선
- Cheong, Seon-Hwan (School of Mechanical Engineering, Kumoh National Instutute of Technology) ;
- Choi, Seong-Dae (School of Mechanical Engineering, Kumoh National Instutute of Technology) ;
- Shon, Jae-Yul (CIES Co., Ltd.) ;
- Mag-isa, Alexander (Department of Mechanical Engineering, Graduate School, Kumoh National Institute of Technology) ;
- Kim, Shin-Ho (TMS, Korea) ;
- Choi, Myoung-Su (A-Jeon Machinery Co.)
- Published : 2006.12.30
Abstract
The inherent problem of a Darrieus wind turbine is its inability to self-start. Usually, a motor is used to provide angular acceleration until lift forces are produced in the airfoil blades or up until the turbine can already sustain its speed on its own. This paper describes a method of improving the self-starting of an H-type Darrieus vertical axis wind turbine (VAWT) by incorporating a helical Savonius turbine thus utilizing a drag-lift combination. The effect of each turbine in the combination relative to each other is investigated by testing a prototype windmill consisting of three NACA 0015 airfoil blades combined with a Savonius rotor with a helix angle of 180 degrees and whose swept area equals 30% of the entire turbine.
Keywords
- Windmill;
- Helical Savonius Rotor;
- VAWT;
- Tip Speed Ratio;
- Self-starting;
- Helix Angle;
- Darrieus Wind Turbine