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RESEARCH PAPERS

Hydrodynamic Characteristics of a Mechanical Pectoral Fin

[+] Author and Article Information
Naomi Kato

Department of Marine Design and Engineering, School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu, Shizuoka 424-8610, Japan

J. Fluids Eng 121(3), 605-613 (Sep 01, 1999) (9 pages) doi:10.1115/1.2823512 History: Received April 03, 1998; Revised April 05, 1999; Online December 04, 2007

Abstract

This paper describes the use of a mechanical pectoral fin as a new device for maneuvering and stabilizing an underwater vehicle. The mechanical pectoral fin consists of two servo-motors generating a feathering motion and a rowing motion. The hydrodynamic characteristics of the device were analyzed experimentally and theoretically. The mechanical pectoral fin generates a thrust force in a range of phase differences between both motions. The unsteady vortex-lattice method, which takes into account the effects of viscosity, reasonably expresses the unsteady forces acting on the mechanical pectoral fin.

Copyright © 1999 by The American Society of Mechanical Engineers
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