Calculation of Viscous Effects on Ship Wave Resistance Using Axisymmetric Boundary Layer Approaches

Abstract

This report investigates the effect of fluid viscosity on ship wave resistance for a wide range of ship hulls. Two direct, simple models are used to model the potential flow around the hull: Michell thin-ship theory and zeroth order slender ship theory. The viscous flow is modeled by two relatively simple integral boundary layer methods, both of which approximate the actual hell by axisymmetric bodies. The various methods are used to calculate wave resistance for a series of speeds for five ship hulls, three of which have extensive experimental data. The results basically show that the trend of the viscous correction is to improve the agreement of the calculated and measured values. For the thicker ship hull cases, the results indicate that a more complex potential flows wave resistance theory is required to obtain reasonable agreement with measured results.

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Document Details

Document Type
Technical Report
Publication Date
May 13, 1985
Accession Number
ADA155197

Entities

People

  • H. T. Wang

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Bodies Of Revolution
  • Boundary Layer
  • Boundary Layer Flow
  • Computers
  • Flow Fields
  • Fluid Dynamics
  • Froude Number
  • Geometry
  • Hulls (Marine)
  • Military Research
  • Model Tests
  • Pressure Distribution
  • Pressure Gradients
  • Reynolds Number
  • Surface Properties
  • Two Dimensional
  • Viscous Flow

Readers

  • Fluid Dynamics.
  • Marine Hydrodynamics