Aerodynamic Drag of Cylindrical Vehicles Moving Concentrically Within Long Tubes

Abstract

A numerical analysis is made of developing and developed turbulent flow in the annular region between a cylinder moving at constant velocity within a fixed concentric tube. Turbulent shear is modeled by eddy viscosity, and a uniform velocity is assumed at the entrance to the annular region. The computations extend and modify the method of Sud and Chaddock (1981) to arbitrary Reynolds numbers and radius ratios. While this report is based on the author's masters thesis the fully developed flow results are more complete, and those for developing flow are more accurate. Better accuracy was achieved by implementing double precision, which enabled the computations to be performed further into the developing region. Keywords: Drag forces, Cylindrical vehicles, Flow modeling.

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Document Details

Document Type
Technical Report
Publication Date
Mar 09, 1988
Accession Number
ADA197947

Entities

People

  • D. A. Kotlow

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Aerodynamic Characteristics
  • Aerodynamic Drag
  • Boundary Layer
  • Central Processing Units
  • Coefficients
  • Computational Fluid Dynamics
  • Equations
  • Fluid Dynamics
  • Fluid Mechanics
  • Mechanical Properties
  • Mechanics
  • Pressure Gradients
  • Pressure Signatures
  • Reynolds Number
  • Turbulent Flow
  • Two Dimensional

Fields of Study

  • Engineering
  • Physics

Readers

  • Fluid Dynamics.