Fast motion of heaving airfoils

Verma, Siddartha (Computational Science and Engineering Laboratory, ETH Zürich, Switzerland) ; Novati, Guido (Computational Science and Engineering Laboratory, ETH Zürich, Switzerland) ; Noca, Flavio (School of Engineering, Architecture and Landscape (hepia), HES-SO // University of Applied Sciences Western Switzerland) ; Koumoutsakos, Petros (Computational Science and engineering Laboratory, ETH Zürich, Switzerland ; Radcliffe Institute of Advanced Study, Harvard University, MA, USA ; Wallace Visiting Professor, Massachussetts Institute of Technology, MA, USA)

Heaving airfoils can provide invaluable physical insight regarding the flapping flight of birds and insects. We examine the thrust-generation mechanism of oscillating foils, by coupling two-dimensional simulations with multi-objective optimization algorithms. We show that the majority of the thrust originates from the creation of low pressure regions near the leading edge of the airfoil. We optimize the motion of symmetric airfoils exploiting the Knoller-Betz-Katzmayr effect, to attain high speed and lower energy expenditure. The results of the optimization indicate an inverse correlation between energy-efficiency and the heaving-frequency and amplitude for a purely-heaving airfoil.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEPIA - Genève
Institute:
inSTI - Institut des Sciences et Technologies industrielles
Date:
2017-06
Pagination:
10 p.
Published in:
Procedia Computer Science
Numeration (vol. no.):
2017, vol. 108, pp. 235-244
DOI:
ISSN:
1877-0509
Appears in Collection:



 Record created 2020-09-15, last modified 2020-10-27

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