Journal of Fluid Mechanics

Hydrodynamic propulsion by large amplitude oscillation of an airfoil with chordwise flexibility

J.  Katz a1 and D.  Weihs a1
a1 Department of Aeronautical Engineering, Technion-Israel Institute of Technology, Haifa

Article author query
katz j   [Google Scholar] 
weihs d   [Google Scholar] 


The hydrodynamic forces due to the motion of a flexible foil in a large amplitude curved path in an inviscid incompressible flow are analysed. A parametric study of large amplitude oscillatory propulsion, with special emphasis on the effect of chordwise flexibility of the fin, is presented. This flexibility was found to increase the propulsive efficiency by up to 2% while causing small decreases in the overall thrust, compared with similar motion with rigid foils.

(Published Online April 19 2006)
(Received February 8 1978)