The wind turbine has become more popular in recent years, but on the other hand, the developments of small wind-turbine have been legging behind. Because, the energy density of wind is small, since the efficiency of the main part of a wind turbine is very low. The construction costs become comparatively high-priced. Then, the main part of this subject is to show that, by collecting and sucking out more winds, a wind turbine is made to pass many winds and the new cross-flow wind turbine that increases an output coefficient is proposed. The cross-flow wind turbine has high torque and low speed characteristics and the structure are very simple. So, it can be used in a large wind velocity region. However, even if the power coefficient is high, it is about 10%. The purpose of this paper is to show how we can improve the power coefficient by applying a casing, which has a nozzle and a diffuser. This research was made to clear up fundamental characteristics of the interaction between outer flow and inner flow. Three kinds of cross-flow wind turbines were designed. The nozzle and diffuser have been designed suitable for the performance of wind turbine. The flow simulations by CFD have been carried out for various types of casings at 20 m/s with Fluent Ver5.0. All Wind tunnel experiments were performed at 20m/s. The case of casing 2, which have plate arranged near the separation point of cylinder, also experimented. The rotor that is settled in the casing 1 shows a larger power coefficient than the case without a casing. The casing of the cross-flow turbine makes a pressure difference between inflow and outflow. The pressure difference increases the mass flow rate. Therefore much more wind passes through into the cross-flow turbine. In this experiment, the power coefficient increased 1.5 times in the case with casing. A still higher output coefficient could be obtained in the case where it is shown by the casing 2.
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ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
July 6–10, 2003
Honolulu, Hawaii, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3697-5
PROCEEDINGS PAPER
Study on Performance and Internal Flow of Cross-Flow Wind Turbine Available to Purchase
Kazuki Takeuchi,
Kazuki Takeuchi
ShinMaywa Industries, Ltd., Hyougo, Japan
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Junichiro Fukutomi,
Junichiro Fukutomi
University of Tokushima, Tokushima, Japan
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Hidetoshi Kodani,
Hidetoshi Kodani
University of Tokushima, Tokushima, Japan
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Hironori Horiguchi
Hironori Horiguchi
University of Tokushima, Tokushima, Japan
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Kazuki Takeuchi
ShinMaywa Industries, Ltd., Hyougo, Japan
Junichiro Fukutomi
University of Tokushima, Tokushima, Japan
Hidetoshi Kodani
University of Tokushima, Tokushima, Japan
Hironori Horiguchi
University of Tokushima, Tokushima, Japan
Paper No:
FEDSM2003-45101, pp. 597-602; 6 pages
Published Online:
February 4, 2009
Citation
Takeuchi, K, Fukutomi, J, Kodani, H, & Horiguchi, H. "Study on Performance and Internal Flow of Cross-Flow Wind Turbine." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 2: Symposia, Parts A, B, and C. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 597-602. ASME. https://doi.org/10.1115/FEDSM2003-45101
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