Velocity and Vorticity Distributions Over an Oscillating Airfoil Under Compressible Dynamic Stall

Abstract

The velocity and vorticity fields around an oscillating airfoil in compressible dynamic stall are reported. Phase averaged, two component laser velocimetry data were obtained at a freestream Mach number of 0.3 and a reduced frequency of 0.05. This is the first set of velocity data available at a high Reynolds number (540,000) under compressible flow conditions and it serves as a good database for development and validation of computer codes. Of particular interest is the formation of a separation bubble, which bursts coincidently with the formation of the dynamic stall vortex, adding an extra degree of physical complexity to the problem.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1993
Accession Number
ADA271217

Entities

People

  • Muguru S. Chandrasekhara
  • Sheikh Z. Ahmed

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Aeronautics
  • Boundary Layer
  • Compressible Flow
  • Fixed Wing Aircraft
  • Flow
  • Fluid Dynamics
  • Laminar Boundary Layer
  • Laser Velocimeters
  • Leading Edges
  • Mach Number
  • Measurement
  • Military Research
  • New York
  • Pressure Gradients
  • Reynolds Number
  • United States

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computational Modeling and Simulation

Technology Areas

  • Directed Energy