Application of Three-Component PIV to a Hovering Rotor Wake

Abstract

Three-component velocity measurements in the wake of a two-bladed rotor in hover were made using the Particle Image Velocimetry "PIV" technique. The velocity fields were oriented in a plane normal to the rotor disk and were acquired for wake ages ranging from 0 to 270 deg. for one rotor thrust condition. The experimental setup and processing of the instantaneous images are discussed. Data averaging schemes are demonstrated to mitigate the smearing effects of vortex wander. The effect of vortex wander on the measured vortex core size is presented.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2000
Accession Number
ADA480590

Entities

People

  • Alan J. Wadcock
  • Anita I. Abrego
  • Gloria K. Yamauchi
  • James T. Heineck
  • Luiz Lourenco

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Acquisition
  • Assembly
  • Cameras
  • Cross Correlation
  • Data Processing
  • Flow
  • Flow Fields
  • Image Processing
  • Measurement
  • Particles
  • Physics
  • Statistical Analysis
  • Stratified Fluids
  • Test Stands
  • Trailing Edges
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Fluid Mechanics and Fluid Dynamics.
  • Inertial Navigation Systems.