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Dynamic reactions of a free-pitching foil to the reverse Kármán vortices
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/content/aip/journal/pof2/26/3/10.1063/1.4870064
2014-03-28
2014-07-26

Abstract

In order to understand the energy saving mechanism of fish schooling, the dynamic reactions of a free-pitching downstream foil to the oncoming reverse Kármán vortices shed from a flapping leading foil are investigated numerically. When the position of the hindfoil is optimized in a staggered arrangement, a significant augmentation of the thrust efficiency for the whole two-foil system is obtained because of the suction effect of a vortex pair formed at the leading edge of the hindfoil and the guide-plate effect of the hindfoil on the mean-flow jet originated at the trailing edge of the forefoil.

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Scitation: Dynamic reactions of a free-pitching foil to the reverse Kármán vortices
http://aip.metastore.ingenta.com/content/aip/journal/pof2/26/3/10.1063/1.4870064
10.1063/1.4870064
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