Propeller Acoustics Test Facility (Capability Description).

Abstract

This report describes the development of a research facility to investigate fan and propeller noise generation mechanisms. A 3500 horsepower electric whirl rig was modified to allow both near- and far-field acoustic testing. The rig is located in a large building with acoustically-treated walls. Reverberation time and sound pressure level measurements were conducted to determine the acoustic characteristics of the building. Acoustic data is acquired using a portable analog FM multichannel tape recorder system. The resultant data is frequency analyzed in one-third octave or narrow bonds. A series of data presentation programs have been developed to cross plot key performance and acoustic parameters. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1977
Accession Number
ADA045409

Entities

People

  • Paul A. Shahady
  • Robert M. Mcgregor
  • Sigmund W. Kizirnis

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Acoustics
  • Acquisition
  • Air Force
  • Background Noise
  • Computer Programs
  • Data Acquisition
  • Far Field
  • Frequency Bands
  • Geometry
  • Measurement
  • Propeller Noise
  • Research Facilities
  • Sound Pressure
  • Tape Recorders
  • Test Facilities
  • Turbines

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Wave Propagation and Nonlinear Chaotic Dynamics.