On the Unsteady Characteristics of Flows Around an NACA 0012 Airfoil.

Abstract

Unsteady excitation was generated by a rotating elliptical cylinder located below and behind the airfoil. This produced an unsteady flow of approximately constant phase. Four regions were identified within the unsteady turbulent boundary layer and the viscous sublayer was most affected by the unsteady flow. The velocity phase shift was found to be a function of the reduced frequency of the rotating elliptical cylinder. This phenomena was examined experimentally and analytically.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1986
Accession Number
ADA179654

Entities

People

  • Eugene E. Covert
  • Kirk J. Flittie
  • Michael J. Fletcher
  • Samuel W. Linton

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Flow Fields
  • Fluid Mechanics
  • Frequency
  • Hot Wire
  • Insensitive Explosives
  • Marine Engineering
  • Phase Shift
  • Pressure Distribution
  • Pressure Gradients
  • Pressure Measurement
  • Reynolds Number
  • Skin Friction
  • Traveling Waves
  • Turbulent Boundary Layer
  • Unsteady Flow

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.