Survey of Thermoclines and Drag-Reduction Properties of Water in the Major Basins at the Naval Ship Research and Development Center

Abstract

A systematic survey of temperature variation with depth was conducted in the David W. Taylor Model Basin (TMB) and the Maneuvering and Seakeeping (MASK) facilities at the Naval Ship Research and Development Center. Water samples from the basins were periodically tested for the presence of drag- reducing substances. A significant upper thermocline and an overall temperature gradient were found in the two basins of TMB. A weak, transient gradient was found in the seakeeping basin of MASK. No significant gradient could be found in the rotating-arm basin of MASK. Except for two highly transient occurrences in the drydock area of the rotating arm, none of the samples from the basins exhibited significantly lower drag. A tendency for slightly lower drag, 1% or less, was noted in the TMB basins. Precautions that are taken at the Center to prevent buildup of drag-reducing substances in the experimental facilities appear to be highly effective.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1973
Accession Number
AD0774886

Entities

People

  • David W Taylor
  • N. Santelli

Tags

DTIC Thesaurus Topics

  • Classification
  • Computational Fluid Dynamics
  • Concrete
  • Drag
  • Drag Reduction
  • Engineering
  • Instrumentation
  • Marine Engineering
  • Materials
  • Mathematics
  • Measurement
  • Model Basins
  • Model Tests
  • Naval Architecture
  • Research Facilities
  • Ship Model Basins
  • Temperature Gradients

Fields of Study

  • Environmental science

Readers

  • Marine Hydrodynamics
  • Oceanography.
  • Systems Analysis and Design