Aerodynamic performances and flow fields of pareto optimal solutions in an aerodynamic design of a wind-lens turbine

Nobuhito Oka, Masato Furukawa, Kazutoyo Yamada, Akihiro Oka, Yasushi Kurokawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The new type of shrouded wind turbine called "wind-lens turbine" has been developed. The wind-lens turbine has a brimmed diffuser called "wind-lens", by which the wind concentration on the turbine blade and the significant enhancement of the turbine output can be achieved. A simultaneous optimization method for the aerodynamic design of rotor blade and wind-lens has been developed. The present optimal design method is based on a genetic algorithm (GA) which enables multi objective aerodynamic optimization. In the present study, aerodynamic performances and flow fields of the Pareto optimal solutions of wind-lens turbines designed by the present optimal design method have been investigated by windtunnel tests and three-dimensional Reynolds averaged Navier-Stokes (RANS) analyses. Output power coefficients obtained from the wind-tunnel tests in the optimal wind-lens turbine exceeded the Betz limit, which is the performance limitation for bare wind turbines. The numerical results and the experimental results show that the suppression of flow separations in the diffuser is important to achieve significant improvement in aerodynamic performances. As a result, it is found that the aerodynamic performance of wind-lens turbine is significantly affected by the interrelationship between the internal and external flow fields around the wind-lens.

Original languageEnglish
Title of host publicationOil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791856802
DOIs
Publication statusPublished - Jan 1 2015
EventASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015 - Montreal, Canada
Duration: Jun 15 2015Jun 19 2015

Publication series

NameProceedings of the ASME Turbo Expo
Volume9

Other

OtherASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015
CountryCanada
CityMontreal
Period6/15/156/19/15

Fingerprint

Lenses
Flow fields
Aerodynamics
Turbines
Wind turbines
Turbomachine blades
Flow separation
Wind tunnels
Rotors
Genetic algorithms

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Oka, N., Furukawa, M., Yamada, K., Oka, A., & Kurokawa, Y. (2015). Aerodynamic performances and flow fields of pareto optimal solutions in an aerodynamic design of a wind-lens turbine. In Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy (Proceedings of the ASME Turbo Expo; Vol. 9). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT2015-43619

Aerodynamic performances and flow fields of pareto optimal solutions in an aerodynamic design of a wind-lens turbine. / Oka, Nobuhito; Furukawa, Masato; Yamada, Kazutoyo; Oka, Akihiro; Kurokawa, Yasushi.

Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy. American Society of Mechanical Engineers (ASME), 2015. (Proceedings of the ASME Turbo Expo; Vol. 9).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Oka, N, Furukawa, M, Yamada, K, Oka, A & Kurokawa, Y 2015, Aerodynamic performances and flow fields of pareto optimal solutions in an aerodynamic design of a wind-lens turbine. in Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy. Proceedings of the ASME Turbo Expo, vol. 9, American Society of Mechanical Engineers (ASME), ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, GT 2015, Montreal, Canada, 6/15/15. https://doi.org/10.1115/GT2015-43619
Oka N, Furukawa M, Yamada K, Oka A, Kurokawa Y. Aerodynamic performances and flow fields of pareto optimal solutions in an aerodynamic design of a wind-lens turbine. In Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy. American Society of Mechanical Engineers (ASME). 2015. (Proceedings of the ASME Turbo Expo). https://doi.org/10.1115/GT2015-43619
Oka, Nobuhito ; Furukawa, Masato ; Yamada, Kazutoyo ; Oka, Akihiro ; Kurokawa, Yasushi. / Aerodynamic performances and flow fields of pareto optimal solutions in an aerodynamic design of a wind-lens turbine. Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy. American Society of Mechanical Engineers (ASME), 2015. (Proceedings of the ASME Turbo Expo).
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