Noise Suppression in Jet Inlets.

Abstract

This report summarizes the work performed during the second year of an AFOSR sponsored research program that was primarily concerned with the development of an analytical technique for determining the radiated sound field from axisymmetric jet engine inlet configurations. The analytical technique employed is based upon an integral representation of the external (radiation) solutions of the Helmholtz equation which describe the sound fields external to a given body under either no flow or constant velocity flow situations. The integral representation developed during the course of this research program is different from earlier works in the sense that it not only yields the correct (unique) solution for all radiation problems at all frequencies, but that the resulting integral equations contain no strong (i.e., nonintegrable) singularities and therefore can be solved by straight forward numerical techniques.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1979
Accession Number
ADA069787

Entities

People

  • Ben T. Zinn
  • William A. Bell
  • William I. Meyer

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Acoustic Impedance
  • Acoustic Phenomena
  • Acoustic Properties
  • Acoustic Velocity
  • Acoustic Waves
  • Acoustics
  • Computer Programs
  • Computers
  • Engineering
  • Equations
  • Experimental Data
  • Integral Equations
  • Resonant Frequency
  • Standing Waves
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Fluid Dynamics.