An Integral Prediction Method for Three-Dimensional Turbulent Boundary Layers on Ships.

Abstract

This report presents refinements of a previous momentum-integral method for calculating three-dimensional turbulent boundary layers on ship hulls. In particular the following refinements are made: the small crossflow assumption is removed; numerical calculation of the double model potential flow replaces the slender body potential flow; a more general and versatile orthogonal coordinate system is used in place of the streamline surface coordinate system; and finally, an improved numerical method is used for solving the momentum-integral boundary-layer equations. It is shown that the boundary layer calculation method, developed here, can be used to calculate certain boundary layer parameters, such as boundary layer thickness or skin friction, with fair accuracy cover a large portion of hulls that maintain unseparated flow. The surface coordinate system can also be used in other methods for calculating the boundary layer. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1979
Accession Number
ADA072200

Entities

People

  • Christian Von Kerczek
  • Thomas J. Langan

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Coordinate Systems
  • Differential Equations
  • Equations
  • Fluid Dynamics
  • Fluid Mechanics
  • Froude Number
  • Geometry
  • Hydrodynamics
  • Integral Equations
  • Numerical Analysis
  • Ship Models
  • Slender Bodies
  • Three Dimensional
  • Turbulent Boundary Layer

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Fluid Dynamics.