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Dissertation/Thesis Abstract

Hydrodynamic functions of the wing-shaped heads of hammerhead sharks
by Barousse, Julien, M.S., Florida Atlantic University, 2009, 97; 1478554
Abstract (Summary)

The hydrodynamics of three different shark heads: Eusphyra blochii (Winghead shark), Carcharhinus acronotus (Blacknose shark) and Sphyrna tiburo (Bonnethead shark) were investigated. Force transducer measurement was used to explore how the cephalofoil (wing-shaped head) affects maneuverability and efficiency. As the dynamic behavior of maneuvering wings differs from that of the steady state motion, experiments have been conducted to simulate: (1) steady-state (no yaw motion) constant velocity swimming, (2) constant forward velocity with yawing motion of the head, and (3) turning maneuvers. Different range of velocities, angle of attack, yaw frequency and yaw amplitude were tested.

Drag and lift coefficients were calculated and compared. The lift coefficient of Winghead shark is much higher compared to the other sharks. The lift-to-drag ratio showed that the Winghead shark has a hydrodynamic advantage compared to Blacknose shark and Bonnethead shark.

Indexing (document details)
Advisor: Ell, Kerl von
School: Florida Atlantic University
School Location: United States -- Florida
Source: MAI 48/03M, Masters Abstracts International
Subjects: Evolution and Development, Ocean engineering
Publication Number: 1478554
ISBN: 978-1-109-59345-7
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