High Velocity Jet Noise Source Location and Reduction. Task 1. Supplement. Certification of the General Electric Jet Noise Anechoic Test Facility.

Abstract

This report summarizes the certification testing of the General Electric Jet Noise Anechoic Test Facility to be used under the subject program. The precision and accuracy of acoustic measurements are evaluated in terms of: anechoic and far-field environment; ambient levels in the chamber; contamination from piping and combustors; contamination from electronic noise floor; variation of the frequency response of the data acquisition and reduction systems; inaccuracies in aerodynamic instrumentation or fluctuations in the jet aero conditions; and precision errors in the air attenuation model due to environmental fluctuations, gradients and measurement inaccuracies. Jet noise measurements from circular conical nozzles are compared with classical referee data.

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Document Details

Document Type
Technical Report
Publication Date
Feb 22, 1977
Accession Number
ADA042327

Entities

People

  • C. T. Savell
  • E. J. Stringas

Organizations

  • General Electric

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Absorption
  • Acoustic Measurement
  • Air Supplies
  • Ambient Noise
  • Anechoic Chambers
  • Cells
  • Crystal Structure
  • Data Analysis
  • Heat Transfer
  • Human Factors Engineering
  • Mach Number
  • Measurement
  • Pressure Measurement
  • Sound Pressure
  • Test Facilities
  • Velocimeters

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Fluid Dynamics.
  • Internal Combustion Engine (ICE) Technology.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems