On the Breakdown of the Wave Packet Trailing a Turbulent Spot in a Laminar Layer.

Abstract

The evolution of two oblique wave packets trailing the transitional spot was investigated in order to determine the extent of the interaction between the packets and the spot. The experimental investigation, carried out in two slightly different laminar boundary layers characterized by Falkner-Skan parameters of 0 and 0.2, revealed the importance of miniscule pressure gradients on the stability of the laminar boundary layer and the rate at which it can be contaminated by a turbulent spot. Some simple, novel statistical procedures for treating the data were developed and were used to accentuate the understanding of the physical processes governing transition to turbulence. Keywords: hot wire anemometry.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1986
Accession Number
ADA179607

Entities

People

  • A. Glezer
  • I. Wygnanski
  • Y. Katz

Organizations

  • Tel Aviv University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Boundary Layer Transition
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Mechanics
  • Hot Wire
  • Laminar Boundary Layer
  • Layers
  • Pressure Gradients
  • Reynolds Number
  • Stratified Fluids
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing
  • Wave Packets

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.