Centerline Wake Modeling

Abstract

The ERIM Ocean Model (EOM) model was used as part of an end-to-end- simulation of the centerline shipwake. EOM was modified to include Milgram's turbulent damping formulation with Snyder's growth rate and Lyzenga's source- and-sink description. The EOM simulations showed that turbulent dissipation can explain the large negative modulation observed in the centerline wake. Tests were also performed to assess the sensitivity of the centerline RCS to: track aspect, incidence angle, wind direction, wind speed, surface current, and turbulence. It was found that the centerline wake width depended most strongly on the width of the turbulent dissipation region. The modulation depth was most sensitive to the turbulent damping, wind speed, and wind direction. Finally, 16 2D images of the radar cross section of the centerline shipwake were produced by EOM for use as matched filters on the experimental data. Shipwake, Synthetic aperture radar, Turbulence.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1993
Accession Number
ADA272901

Entities

People

  • D. I. Lyzenga
  • J. D. Lyden
  • M. A. True

Organizations

  • Environmental Research Institute of Michigan

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Computational Fluid Dynamics
  • Computer Programs
  • Dissipation
  • Equations
  • Experimental Data
  • Frequency
  • Gravity Waves
  • Inclusions
  • Military Research
  • Production Engineering
  • Radial Velocity
  • Surface Waves
  • Synthetic Aperture Radar
  • Turbulence
  • Turbulent Mixing
  • Two Dimensional
  • Waves

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Marine Hydrodynamics
  • Radar Systems Engineering.