The Unsteady Laminar Boundary Layer on an Axisymmetric Body Subject to Small Amplitude Fluctuations in the Free-Stream Velocity

Abstract

The effect of small amplitude, time-periodic, freestream disturbances on an otherwise steady axisymmetric boundary layer on a circular cylinder is considered. Numerical solutions of the problem are presented, and an asymptotic solution, valid far downstream along the axis of the cylinder is detailed. Particular emphasis is placed on the unsteady eigensolutions that occur far downstream, which turn out to be very different from the analogous planar eigensolutions. These axisymmetric eigensolutions are computed numerically and also are described by asymptotic analyses valid for low and high frequencies of oscillation.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1991
Accession Number
ADA239126

Entities

People

  • Peter W. Duck

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Asymptotic Series
  • Axisymmetric
  • Boundaries
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Computers
  • Contracts
  • Engineering
  • Equations
  • Fluid Dynamics
  • Free Stream
  • Frequency
  • Hydrodynamics
  • Laminar Boundary Layer
  • Layers

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.