A THEORETICAL STUDY OF THE EFFECT OF VISCOSITY ON WAVE RESISTANCE

A simple mathematical model is proposed for the effect of viscosity on the wave resistance of a ship, and evaluated within the frame of linearized theory. The present investigation considers a Joukowski strut infinitely deep in a uniform stream and the viscosity effect is considered as represented by vortex sheets shed abaft the stern. The vortex sheets being shed behind the strut are represented equivalently by a distribution of doublets. The image of the vortex system, as well as the image system of the doublet distribution, is correspondingly placed within the hull contour. The wave resistance due to the system of singularities representing wake, image and hull consists of six components, coupled and uncoupled. A numerical calculation has revealed that the coupled terms of the wake-hull and image-hull contribute predominantly to the reduction of the wave resistance and this was more accentuated as the width of the separation points was increased. (Author)

• Corporate Authors:

  Stevens Institute of Technology

  Davidson Laboratory, Castle Point Station
  Hoboken, NJ  United States  07030
• Authors:
  • Kim, C H
  • Breslin, J P
• Publication Date: 1972-1

Media Info

• Pagination: 41 p.

Subject/Index Terms

• TRT Terms: Drag forces; Hydrodynamic pressure; Vortex shedding; Wave resistance
• Old TRIS Terms: Hydrodynamic forces
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00034703
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: SIT-DL-72-1596 Final Rpt
• Contract Numbers: N00014-67-A-02020022, Nonr-263(65)
• Files: TRIS
• Created Date: Sep 29 1972 12:00AM