A Flow Visualization Study of a High Pitch Cycloidal Propeller

Abstract

An experimental test program designed to study the flow through a cycloidal propeller (P/D = pi/.70) was conducted in the water tunnel at the National Research Laboratories in Ottawa. Visualization of the flow was achieved by injecting reflecting particles that followed the streamlines and by illuminating sections of the flow with a plane light source. Records were made using both still and movie cameras. The tunnel speed was varied to permit views of the working model to be taken at several advance ratios. For purposes of detailed analysis, the actual angle of attack and resultant velocity vectors were calculated from the inflow parameters obtained from still pictures. The loads normal to the blade were measured and compared to loads obtained by calculation.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1972
Accession Number
AD0755493

Entities

People

  • Alfred L. Jobst
  • Peter A. Bandler

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Cameras
  • Cycloidal Propellers
  • Flow
  • Flow Visualization
  • Free Stream
  • Frequency
  • Geometric Forms
  • Geometry
  • Navy
  • Photographic Equipment
  • Photographic Materials
  • Photographs
  • Photography
  • Resonant Frequency
  • Three Dimensional
  • Visualizations
  • Water Tunnels

Readers

  • Aerodynamics.
  • Optical Physics and Photonics.