Secondary Instability in Boundary-Layer Flows,

Abstract

The stability of a secondary Tollmien-Schlichting wave, whose wavenumber and frequency are nearly one half of those of a fundamental Tollmien-Schlichting instability wave (T-S wave), is analyzed by using the method of multiples. Under these conditions, the fundamental wave acts as a parametric excitor for the secondary wave. When the amplitude of the fundamental wave is small, the amplitude of the secondary wave deviates slowly from its unexcited state. However, as the amplitude of the fundamental wave increases, so does the amplitude of the secondary wave even in the regions where it is damped in the unexcited state. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1978
Accession Number
ADA058804

Entities

People

  • Ali N. Bozatli
  • Ali. H. Nayfeh

Organizations

  • Virginia Tech

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aeronautics
  • Aircrafts
  • Applied Mechanics
  • Boundary Layer
  • Differential Equations
  • Engineering
  • Equations
  • Flow
  • Frequency
  • Jet Propulsion
  • Mathematical Analysis
  • Mechanical Engineering
  • Mechanics
  • Military Research
  • New York
  • Secondary Waves
  • United States

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.