Effect of Specific Types of Surface Roughness on Boundary-Layer Transition

Abstract

The Reynolds Number at which surface projections of a given type but of various sizes and chordwise locations which would cause premature transition was determined. This number is primarily a function of the projection geometry and the Reynolds Number based on the height of the projection, and the velocity at the top of the projection. The laminar boundary is more sensitive to surface projections than to surface grooves or sanding scratches.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1946
Accession Number
ADA801365

Entities

People

  • Laurence K. Loftin Jr.

Organizations

  • National Advisory Committee for Aeronautics

Tags

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Transition
  • Fineness Ratio
  • Geometry
  • Laminar Boundary Layer
  • Laminar Flow
  • Layers
  • Leading Edges
  • Low Drag
  • Low Drag Airfoils
  • Pressure Distribution
  • Pressure Gradients
  • Reynolds Number
  • Roughness
  • Surface Roughness
  • Transitions
  • Turbulent Flow

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Image Processing and Computer Vision.
  • Surface Coatings Technology.