The Generation and Radiation of Supersonic Jet Noise. Volume III. Progress Toward a Unified Theory of Jet Engine Noise.

Abstract

Existing theories of aerodynamic noise generation are critically reviewed with special emphasis on conceptual adequacy and physical scope with special reference to supersonic jet noise. In this review the basic work of Stokes, Kirchoff and Rayleigh on fluctuating motions in fluids is recalled and developed to provide a firm basis for the critique. The advantages and disadvantages of acoustic analogy theories such as Lighthill's are thoroughly discussed in Section 11.3. A contribution is made towards removing the criticisms made by Lighthill of Ribner's 'isotropic source tensor' theory. New developments such as those by Crow, Lilley and Doak are emphasized. On the basis of the evidence provided by the critical review, a new unified theory for jet noise has been devised. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1972
Accession Number
AD0749138

Entities

People

  • Philip E. Doak

Tags

DTIC Thesaurus Topics

  • Acoustic Phenomena
  • Aerodynamic Noise
  • Demographic Cohorts
  • Engine Noise
  • Engines
  • Jet Engine Noise
  • Jet Engines
  • Noise
  • Noise (Sound)
  • Radiation
  • Sound

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.

Technology Areas

  • Hypersonics