Aeolian Tones from Circular Cylinders of Non-Uniform Cross Section.

Abstract

Lighthill's theory of aerodynamic sound is reviewed. Applications of this theory to different cylinder classes are synthesized and extended to cylinder types not addressed previously. An experiment wherein cylinders are placed in an open jet, permitting simultaneous measurement of total lift force, correlation parameters and radiated sound intensity, is conducted. Over the Reynolds number range 1000 to 50,000, the theory of aerodynamic sound is validated for uniform, roughened, skewed, finned and notched cylinders and for cylinders with splitter plates. Reduction of lift force, by any means, is shown to reduce radiated sound intensity, and local lift force is found to vary monotomically with the two dimensionality of the vortex wake. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1976
Accession Number
ADA035994

Entities

People

  • Steven Robert Cohen

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Boundary Layer
  • Fish
  • Fluid Dynamics
  • Fluid Mechanics
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Physics Laboratories
  • Resonant Frequency
  • Reynolds Number
  • Strouhal Number
  • Test And Evaluation
  • Three Dimensional
  • Turbulence
  • Turbulent Mixing
  • Vortex Shedding

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Aerodynamics/Aeronautics.
  • Fluid Mechanics and Fluid Dynamics.