BASE-VENTED PROPELLER,

Abstract

This report describes the design and testing of a propeller with base-vented blades. A semi ellipse with a parallel afterbody was chosen as a cross section for the blades. This shape, with a trailing cavity, has a lower cavitation index than a blade section of the same thickness ratio that converges to a thin trailing edge. The blade shape has a large area moment for increased strength and a relatively large leading-edge radius, which reduces the tendency for a low pressure region to develop at the leading edge attributable to an off-design angle of attack. The low cavitation index allows the blade to op erate at moderate depths at high forward velocity and rpm. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1963
Accession Number
AD0411980

Entities

People

  • G.g. Mosteller

Organizations

  • Naval Air Weapons Station China Lake

Tags

DTIC Thesaurus Topics

  • Afterbodies
  • Cavitation
  • Edges
  • Leading Edges
  • Physical Properties
  • Propellers
  • Thickness
  • Trailing Edges

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).