Concepts for Cavitation Alleviation of Banded and Ducted Rotor Tips

Abstract

This study explored concepts and recommend geometries for alleviating the cavitation sensitivity of blade-band junctions of banded and ducted underwater propellers. A lifting surface model of the tip region of the blade, the band and the duct wall was used to calculate in detail the blade load carry- over onto the band and the duct wall. Geometry modifications of the blade tip and the band camber were made to alleviate cavitation sensitivity. Two- dimensional models were used to assess the effect of blade and band thickness. Both design and analysis type codes were used. It is concluded that, with proper use of band camber, the suction pressure in the blade band junction can be tailored to alleviate cavitation.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 15, 1991
Accession Number
ADA236254

Entities

People

  • John E. Yates
  • Stephen F. Parker

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Aspect Ratio
  • Blade Tips
  • Blades
  • Cavitation
  • Engineering
  • Geometry
  • Leading Edges
  • Lifting Surfaces
  • Load Distribution
  • Military Research
  • Models
  • Propellers
  • Sensitivity
  • Shrouded Propellers
  • Surfaces
  • Thickness
  • Two Dimensional

Readers

  • Aerodynamics.
  • Spectroscopy.
  • Systems Analysis and Design