Flow Visualization Studies of a Fin Protuberance Partially Immersed in a Turbulent Boundary Layer at Mach 5,

Abstract

Various flow-visualization results are presented for a cylindrically blunted, unswept fin (yawed and unyawed) partially immersed in a turbulent boundary layer (delta approx. = 2.6 inches). The model, consisting of a fin-flat plate combination, was tested at a nominal Mach number of 5 and nominal free-stream Reynolds numbers per foot of 2800 000 and 7400 000. Azobenzene tests show regions of high heat transfer on the flat plate immediately upstream and downstream of the fin. Oil smear tests show in detail the surface shear directions and locations of separated flow which occur on the model. Schlieren and shadowgraph photographs indicate the complex shock wave structure which exists in front of the fin. A possible flow-field model is suggested to account for the observed flow patterns. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 20, 1970
Accession Number
AD0716023

Entities

People

  • Allen E. Winkelmann

Organizations

  • Naval Ordnance Laboratory

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Flow
  • Flow Fields
  • Flow Visualization
  • Free Stream
  • Heat Transfer
  • Layers
  • Mach Number
  • Photographs
  • Reynolds Number
  • Shock Waves
  • Turbulent Boundary Layer
  • Visualizations

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.