The active flow control, which can adapt to variation of flow velocity and/or direction, is an effective technique to achieve drag reduction. The present study has investigated a separated shear layer and established two control systems; the system reduces drag force and lift force by controlling the separated shear layer to reattachment for variation of flow velocity and /or direction. The adaptive control system to the variation of flow velocity was constructed by using a hot wire anemometer as a sensor to detect flow separation. The system to flow direction was constructed by using pressure transducers as a sensor to estimate drag force and lift force. The extremum-seeking control was introduced as a controller of the both systems. It is indicated from the experimental results that adaptive drag/lift control system to various flow velocity ranging from 3 to 7 m/s and various flow direction ranging from 0 to 30 deg. was established.
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ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
August 10–14, 2008
Jacksonville, Florida, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4840-1
PROCEEDINGS PAPER
Drag Reduction for Blunt Body With Cross Flow by Extremum-Seeking Control
Nobuhiko Kamagata,
Nobuhiko Kamagata
Keio University, Yokohama, Japan
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Susumu Horio,
Susumu Horio
Keio University, Yokohama, Japan
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Koichi Hishida
Koichi Hishida
Keio University, Yokohama, Japan
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Nobuhiko Kamagata
Keio University, Yokohama, Japan
Susumu Horio
Keio University, Yokohama, Japan
Koichi Hishida
Keio University, Yokohama, Japan
Paper No:
FEDSM2008-55081, pp. 499-506; 8 pages
Published Online:
June 30, 2009
Citation
Kamagata, N, Horio, S, & Hishida, K. "Drag Reduction for Blunt Body With Cross Flow by Extremum-Seeking Control." Proceedings of the ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. Volume 1: Symposia, Parts A and B. Jacksonville, Florida, USA. August 10–14, 2008. pp. 499-506. ASME. https://doi.org/10.1115/FEDSM2008-55081
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