AN ANALYSIS OF THE FORMATION AND MOTION OF TURBULENT PATCHES IN THE TRANSITION BOUNDARY LAYER,

Abstract

An analysis is presented of the formation and motion of turbulent pressure patches under the transition boundary layer on a flat plate in a zero pressure gradient. The shape of the patch on the surface of the plate is assumed to be triangular with an area that increases as the patch moves downstream from its point of inception. The expressions for the cross-correlation and the cross-spectral density of the surface-pressure fluctuations which are obtained are both space and time dependent. A relation is shown to exist between the transition phenomena and the instabilities in the laminar boundary layer. Finally, the analytical results are used to determine the breakdown points of the laminar instabilities. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 07, 1967
Accession Number
AD0819270

Entities

People

  • Michael E. Mccormick

Organizations

  • General Dynamics Electric Boat

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Cross Correlation
  • Instability
  • Laminar Boundary Layer
  • Layers
  • Pressure Gradients
  • Transitions

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Plasma Physics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster