Quality Control Considerations for Fabrication of Model Propellers Intended for Cavitation Testing

Abstract

A study of blade-surface asperities with respect to their effect on cavitation onset on marine propellers is carried out to investigate possible quality control criteria for propeller models intended for cavitation inception tests. The OBO propeller is used as an example to test possible calculation procedures. The asperities consisted of two-dimensional isolated triangular roughness elements, distributed roughness and large scale two-dimensional blade- surface bumps or waves. It was found that useful quality control criteria cannot be formulated for triangular roughness elements because the basic data which would permit their development are not available. However, it does appear feasible to develop quality control criteria for the other two types of blade asperities and computation procedures which can lead to the formulation of blade-surface fabrication specifications are given for them.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 20, 1980
Accession Number
ADA095044

Entities

People

  • B. R. Parkin

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Engineering
  • Fabrication
  • Free Stream
  • Geometry
  • Laminar Boundary Layer
  • Measurement
  • Model Basins
  • Model Tests
  • Navy
  • Pressure Distribution
  • Quality Control
  • Reynolds Number
  • Skin Friction
  • Test And Evaluation
  • Turbulent Boundary Layer
  • Two Dimensional

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Instructional Design and Training Evaluation.
  • Marine Hydrodynamics