Computation of Broadband Mixing Noise from Tubomachinery

Abstract

This paper discusses the phenomena of dispersion and spurious acoustic radiation in calculating propeller noise using finite difference approximation. Dispersion effect here is global in nature and could cause large distortion of the radiated acoustic waveform as the waves propagate away from the propeller.

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Document Details

Document Type
Technical Report
Publication Date
Aug 31, 1990
Accession Number
ADA226559

Entities

People

  • Christopher Tam

Organizations

  • Florida State University

Tags

DTIC Thesaurus Topics

  • Acoustic Waves
  • Boundaries
  • Computations
  • Difference Equations
  • Differential Equations
  • Dispersions
  • Equations
  • Formulas (Mathematics)
  • Helmholtz Equations
  • Noise
  • Partial Differential Equations
  • Propeller Noise
  • Propellers
  • Radiation
  • Wave Equations
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Calculus or Mathematical Analysis
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers