Blade Spindle Moment on a Five-Bladed Controllable-Pitch Propeller.

Abstract

Blade spindle-moment values are presented for the operation of a five-bladed controllable-pitch propeller over a range of blade pitches and advance conditions. Spindle moment (blade turning effort) was measured on a single blade of NSRDC Model Propeller 4402 in an experimental program conducted in the 24-in. variable-pressure water tunnel. Experimental results are presented as mean spindle-moment values taken at steady-state operating conditions. No transient or time-dependent data were taken. The operating conditions investigated (1) positive pitch--steady ahead, (2) negative pitch--steady backing, and (3) negative pitch--ahead advance. The spindle moment due to hydrodynamic loading and that due to centrifugal forces were separated and nondimensionalized. The effects of Reynolds number and propeller blade cavitation are discussed briefly. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1972
Accession Number
ADA035361

Entities

People

  • David W Taylor
  • John J. Nelka
  • Stephen B. Denny

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Boundary Layer
  • Controllable Pitch Propellers
  • Fluid Dynamics
  • Geometry
  • Insensitive Explosives
  • Materials
  • Measurement
  • Mechanics
  • Naval Architecture
  • Pressure Distribution
  • Propellers
  • Propulsion Systems
  • Reynolds Number
  • Steady State
  • Test Facilities
  • Variable Pressure

Fields of Study

  • Physics

Readers

  • Aerodynamics.