Experimental Study of Vortical Features in Three-Dimensional Separated Flows,

Abstract

Possible topological structures of three-dimensional separated flows are studied on a hemisphere-cylinder at incidence. By means of a systematic variation of flow parameters a manifold of skin-friction patterns is produced. It is established that they develop from three basic structures simply by successive splitting of saddles in saddle-node-saddle combinations. The adjoining spatial flow field is visualized in low Reynolds number water tunnel flow, where similar kind of skin friction pattern develops as in fully turbulent flow. Velocity field measurements in the separated region on a rectangular wing indicate that on both models a similar topological structure, including unsteady effects, is possible. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1984
Accession Number
ADP004790

Entities

People

  • H. Bippes

Tags

DTIC Thesaurus Topics

  • Air Force
  • Flow
  • Flow Fields
  • Friction
  • Reynolds Number
  • Skin Friction
  • Stratified Fluids
  • Three Dimensional
  • Turbulent Flow
  • Water Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Graph Algorithms and Convex Optimization.