A Review of the Research at NGTE Concerning the Effects of Flight on Engine Exhaust Noise,

Abstract

The problem of explaining the changes of engine exhaust noise in going from static to flight conditions has puzzled research workers for some years. This paper reviews the various experimental research programmes at NGTE which have been carried out on this topic over the last five years. The step-by-step progress which has been made in the analysis of the problem is described and the results from some recent tests, hitherto unpublished, are presented. It is concluded that, together with the characteristics established for jet noise and internally-generated noise in flight, acoustic and aerodynamic effects arising from the installation of engines in aircraft constitute necessary, perhaps sufficient, features of the required explanation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1978
Accession Number
ADA071439

Entities

People

  • W. D. Bryce

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Absorption
  • Acoustics
  • Air Supplies
  • Aircrafts
  • Anechoic Chambers
  • Boundary Layer
  • Drag
  • Engine Noise
  • Flight Speeds
  • Fluid Mechanics
  • Measurement
  • Noise Reduction
  • Simulators
  • Test Facilities
  • Turbojet Engines
  • Turbulent Mixing
  • Wind Tunnels

Readers

  • Acoustics.
  • Aerospace Engineering
  • Technical Research and Report Writing.