A Contrarotating Propeller Design for a High Speed Patrol Boat with Pod Propulsion.

Abstract

A contrarotating (CR) propeller design with a tractor pod for a high speed patrol boat is addressed. In the current arrangement, a CR propeller is placed at the forward end of a pod which is aligned with the local inflow. The powering and cavitation experiments show the performance prediction agree well with measurements. Compared to the existing controllable pitch propeller with shaft and strut configuration, the pod-mounted CR propeller show a 28% reduction in power consumption at design speed with a 7 knot improvement in cavitation inception speed. At full power, a larger pod is required, which will reduce the gain in power consumption.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1995
Accession Number
ADA302540

Entities

People

  • Benjamin Y.-h. Chen
  • Carol L. Tseng

Organizations

  • Naval Surface Warfare Center Carderock Division

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bubbles
  • Cavitation
  • Classification
  • Controllable Pitch Propellers
  • Diameters
  • Energy Consumption
  • Flow
  • Geometry
  • Lifting Surfaces
  • Measurement
  • Model Basins
  • Open Water
  • Propeller Blades
  • Propellers
  • Propulsion Systems
  • Self Propelled
  • Ship Model Basins

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Marine Hydrodynamics