NEARFIELD INFRASONIC NOISE GENERATED BY THREE TURBOJET AIRCRAFT DURING GROUND RUNUP OPERATIONS.

Abstract

Acoustic measurements in the frequency range between 4.5 to 4500 cycles per second were made on the near field sound pressure environment produced by the F-101B, NF-102A, and F-106A turbojet aircraft during ground runup operations. Results from twentyeight microphone locations show that the maximum infrasonic noise below audio frequency range is generated downstream from the exhaust nozzle and at engine settings producing maximum turbulent flow. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1965
Accession Number
AD0623086

Entities

People

  • Robert G. Powell
  • Robert T. England

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Aircrafts
  • Audio Frequency
  • Exhaust Nozzles
  • Frequency
  • Jet Aircraft
  • Measurement
  • Near Field
  • Sound Pressure
  • Turbojet Engines
  • Turbulent Flow

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Aerospace Engineering
  • Fluid Mechanics and Fluid Dynamics.