The Inviscid Secondary Instability of Fully Nonlinear Longitudinal Vortex Structures in Growing Boundary Layers

Abstract

The inviscid instability of a longitudinal vortex structure within a steady boundary layer is investigated. The instability has wavelength comparable with the boundary layer thickness so that a quasi-parallel approach to the instability problem can be justified. The generalization of the Rayleigh equation to such a flow is obtained and solved for the case when the vortex structure is induced by curvature. Two distinct modes of instability are found; these modes correspond with experimental observations on the breakdown process for Goertler vortices. Keywords: Vortex, Inviscid secondary instability.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1990
Accession Number
ADA228697

Entities

People

  • Nicola J. Horseman
  • Philip Hall

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Boundary Layer Flow
  • Curvature
  • Differential Equations
  • Eigenvalues
  • Engineering
  • Equations
  • Flow Visualization
  • Fluid Flow
  • Instability
  • Layers
  • Leading Edges
  • Observation
  • Stratified Fluids
  • Thickness
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Semiconductor Device Technology