Jet Engine Test Cell Noise Reduction

Abstract

Passive methods for decreasing jet engine test cell noise emissions are evaluated and compared. Such methods have the dual advantages of low cost and simplicity. In addition, the effect on the aerothermal performance of the test cell is minimal. Sound pressure levels were measured in and around test facilities equipped with various devices to further reduce noise. The data were supplemented with parametric studies of noise reduction techniques conducted using a 1/20th scale physical model of the Navy's standard T-10 jet engine test cell. Methods that attack the noise problem from outside and methods that attack the problem from inside the test cell are assessed, including trees and other vegetation, acoustic walls, core busters, and modifications to the exhaust stack. Mounting screens in the path of the jet and increasing the height of the exhaust stack are found to be the most effective.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2000
Accession Number
ADA380948

Entities

People

  • C. A. Kodres

Organizations

  • Naval Facilities Engineering Service Center

Tags

Communities of Interest

  • Biomedical
  • Energy and Power Technologies
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Insulation
  • Acoustic Propagation
  • Acoustics
  • Cells
  • Combustion
  • Computer Programs
  • Frequency Bands
  • Gas Turbines
  • Jet Engine Exhaust
  • Jet Engine Noise
  • Jet Engines
  • Noise Reduction
  • Sound Pressure
  • Test Facilities
  • Turbofan Engines
  • Turboshaft Engines
  • Turbulent Mixing

Readers

  • Aerospace Test and Evaluation
  • Explosive Engineering.
  • Fluid Mechanics and Fluid Dynamics.