Flow Observations and Speed Loss Prediction for USNS WYMAN (T-AGS-34) with an External Bottom Topological Survey System (BOTOSS).

Abstract

The USNS WYMAN (T-AGS-34) has experienced a significant loss of operational time due to air bubbles masking its Bottom Topological Sonar Survey System (BOTOSS). A keel mounted fairing and foil have been designed to house the transmitting and receiving elements of the BOTOSS system. An experimental program was conducted on a hull model of the WYMAN to examine the flow around the hull and BOTOSS appendages, and to predict the loss of speed with the BOTOSS foil and housing fitted to the ship. The results of the experiments with the model indicate that the air bubble masking problem should be decreased significantly with the new design. The estimated speed loss is about 1.3 knots (0.67 m/s) at 3000 shaft horsepower (2240 kilowatts). (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1978
Accession Number
ADA055014

Entities

People

  • David W Taylor
  • William G. Day Jr.

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Bilge Keels
  • Bilges
  • Bubbles
  • Engineering
  • Feet
  • Flow
  • Flow Visualization
  • Friction
  • Horsepower
  • Observation
  • Photographs
  • Planform
  • Power
  • Resistance
  • Shape
  • Ship Hulls
  • Transmitting

Readers

  • Marine Hydrodynamics