Numerical and Experimental Study of the Propulsive Speed of the Three Joint Bending Propulsion Mechanism

[+] Author and Article Information
Motomu Nakashima, Kyosuke Ono

Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro, Tokyo 152, Japan

J. Fluids Eng 118(1), 134-141 (Mar 01, 1996) (8 pages) doi:10.1115/1.2817491 History: Received November 05, 1993; Revised August 09, 1995; Online December 04, 2007


The three joint bending propulsion mechanism as a simplified model offish propulsion is investigated. A numerical method for a coupled system of the bending propulsion mechanism and the fluid is developed, based on the two-dimensional discrete vortex method. The characteristics of the propulsive speed of the three joint bending propulsion mechanism are numerically and experimentally investigated. It is found that the propulsive speed has a maximum numerical and experimental value when all the phase differences of the joints are about zero for four amplitude patterns. The experimental propulsive speeds are found to be 65 ∼ 80 percent of the numerical ones.

Copyright © 1996 by The American Society of Mechanical Engineers
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