On Goertler Instability.

Abstract

Goertler instability for boundary-layer flows over generally curved walls is considered. The full linearized disturbance equations are obtained in an orthogonal curvilinear coordinate system. A perturbation procedure to account for second-order effects is used to determine the effects of the displacement thickness and the variation of the streamline curvature on the neutral stability of the Blasius flow. The pressure gradient in the mean flow is accounted for by solving the non-similar boundary-layer equations. Growth rates are obtained for the actual mean flow and compared with those for the Blasius flow and the Falkner-Skan flows. The results demonstrate the strong influence of the pressure gradient and the nonsimilarity of the basic flow on the stability characteristics. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1979
Accession Number
ADA081255

Entities

People

  • Ali Hasan Nayfeh
  • Saad Aly Ragab

Organizations

  • Virginia Tech

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Boundary Value Problems
  • Computational Fluid Dynamics
  • Computational Science
  • Coordinate Systems
  • Differential Equations
  • Eigenvalues
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Mechanics
  • Inviscid Flow
  • Mechanics
  • Navier Stokes Equations
  • Pressure Gradients
  • Reynolds Number
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.