The Analysis of Sound Propagation in Jet Engine Ducts Using the Finite Difference Method

Abstract

In this report, the author derives the partial differential equations which describe sound propagation in jet engine ducts and then presents a finite difference approach for solving these equations. Also included is a computer program listing, sample input and sample output. The program can handle uniform rectangular and cylindrical ducts with or without uniform flow. In addition, if a mapping function which maps a nonuniform duct to a uniform duct is specified, the program can determine sound fields in nonuniform ducts in the absence of flow.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1979
Accession Number
ADA074233

Entities

People

  • Dennis W. Quinn

Organizations

  • Flight Dynamics Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Cyber
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Air Force
  • Complex Numbers
  • Computational Science
  • Computer Programs
  • Coordinate Systems
  • Difference Equations
  • Differential Equations
  • Dynamics
  • Equations
  • Equations Of Motion
  • Geometry
  • Jet Engines
  • Noise
  • Numbers
  • Plastic Explosives
  • Wave Equations

Readers

  • Fluid Dynamics.
  • Wave Propagation and Nonlinear Chaotic Dynamics.