Impulsively-Started Flow about Submarine-Shaped Bodies.

Abstract

Impulsively-started flow about a D-shaped body, a T-shaped body, and a flat plate has been investigated. The forces and moments acting on the bodies have been determined, as a function of the relative displacement of the fluid at a subcritical Reynolds number, for various angles of attack. The results have shown that the shedding of the first two or three vortices and the manner in which they are generated have profound effects on all the characteristics of resistance. The evolution of the vortices, and hence the forces, significantly depend on whether the separation points are fixed or mobile, or a combination thereof. The data presented are expected to form the basis for future numerical analyses of the characteristics of time-dependent flow about bluff bodies. At present accurate analytical and numerical data, for comparison with those presented do not exist.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1981
Accession Number
ADA102307

Entities

People

  • Howard Keith Kline

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Hydrodynamics
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Numerical Analysis
  • Physics Laboratories
  • Reynolds Number
  • Steady Flow
  • Steady State
  • Turbulent Mixing
  • Viscous Flow

Readers

  • Aerodynamics/Aeronautics.
  • Fluid Dynamics.
  • Systems Analysis and Design