Holographic Interferometry Technique for Rotary Wing Aerodynamics and Noise.

Abstract

In this paper, the concepts of holography and holographic interferometry, as applied to the visualization and measurement of the three-dimensional flow field near a rotor tip, are previewed, and initial experimental results of investigations of local shock structures and tip vortices behind the blade are presented. An additional method to visualize the flow in a three-dimensional manner is demonstrated, and finally, a method to quantitatively measure the three-dimensional flow, which will provide the necessary information to help improve helicopter performance and reduce noise, is introduced.

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Document Details

Document Type
Technical Report
Publication Date
Jun 18, 1982
Accession Number
ADA117425

Entities

People

  • John K. Kittleson
  • Yung H. Yu

Organizations

  • Ames Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustics
  • Far Field
  • Flow
  • Flow Fields
  • Helicopters
  • Holograms
  • Hot Wire
  • Images
  • Interferograms
  • Interferometry
  • Mach Number
  • Measurement
  • Photographic Film
  • Three Dimensional
  • Three Dimensional Flow
  • Transonic Flow
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Image Processing and Computer Vision.