Reference Manual on the Theory of Lifting Surface Noise at Low Mach Numbers

Abstract

A summary review is made of the theory of aerodynamic sound in low Mach number flows, with particular emphasis on procedures for estimating the influence of solid boundaries on sound production. Special consideration is given to the production of sound by nominally steady flow over a lifting or control surface. Four categories of interactions are discussed involving (1) a large, nominally flat surface, (2) a large surface with a trailing edge, (3) a lifting surface of compact chord and finite span, and (4) a trailing edge with a streamwise slot or part-span flap. The results can be combined with steady state numerical predictions to express the radiation in terms of calculated mean flow properties.

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Document Details

Document Type
Technical Report
Publication Date
Jan 09, 1998
Accession Number
ADA338190

Entities

People

  • Michael S. Howe

Organizations

  • Boston University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Control Surfaces
  • Convection
  • Flow
  • Fluid Dynamics
  • Geometry
  • Lifting Surfaces
  • Mach Number
  • Steady Flow
  • Trailing Edges
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Control Systems Engineering.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering