THE FORCE ON A SLENDER FISH-LIKE BODY

The force acting on a fish-like body with combined thickness and lifting effects is analyzed on the assumption of inviscid flow. A general expression is developed for the pressure force on the body, which is analogous to the momentum-flux analysis for non-lifting bodies in classical hydrodynamics. For bodies with constant volume, the mean drag (or propulsive) force is expressed in terms of a contour integral around the vortex sheet behind the body. Attention is focused on the case of steady-state motion with constant angle of attack, and the induced drag is analyzed for finned axisymmetric bodies using a slender-body approximation. (Modified author abstract)

• Supplemental Notes:
  • Originally published in Journal of Fluid Mechanics, Vol. 58 Part 4, pp 689-702, 1973.
• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Ocean Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • Newman, J N
• Publication Date: 1972-11-20

Media Info

• Pagination: 15 p.

Subject/Index Terms

• TRT Terms: Aerodynamic lift; Angle of attack; Drag; Fishes; Flow; Hydrodynamics; Inviscid fluids; Mathematical models; Pressure; Submarines; Thickness; Thinness; Trailing edges; Vortices
• Old TRIS Terms: Axially symmetric flow; Hydrodynamic configurations; Inviscid flow; Lifting surface theory; Slender bodies
• Subject Areas: Design; Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00051132
• Record Type: Publication
• Source Agency: National Technical Information Service
• Files: TRIS
• Created Date: Feb 28 1974 12:00AM