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Related Experiment Videos

Approximations for modal coupling in scattered fields from orifices

Horner1, Lyons, Petersson

  • 1Department of Aeronautical and Automotive Engineering, Loughborough University, United Kingdom.

The Journal of the Acoustical Society of America
|August 24, 2000
PubMed
Summary
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This study analyzes wave fields scattered from a circular orifice, detailing modal contributions to velocity potential. Approximations for modal coupling effects are developed and validated against conventional methods.

Area of Science:

  • Acoustics
  • Wave propagation
  • Fluid dynamics

Background:

  • Previous studies utilized Hankel transforms for wave fields impinging on orifices.
  • The scattered field and its modal contributions to velocity potential were previously examined.

Purpose of the Study:

  • To investigate modal contributions to scattered wave amplitude.
  • To develop and apply approximations for modal coupling effects.
  • To compare results with conventional solutions.

Main Methods:

  • Analysis of modal contributions to velocity potential amplitude.
  • Consideration of in-orifice wave amplitudes and driving terms.
  • Development of approximations for modal coupling effects.

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Main Results:

  • Modal amplitudes depend on in-orifice waves and unique driving terms.
  • Approximations for modal coupling effects were derived.
  • Calculated scattered fields using approximations were compared to full modal coupling solutions.

Conclusions:

  • The study provides a modal basis for investigating scattered wave amplitudes.
  • Approximations for modal coupling offer a viable alternative to conventional methods.
  • Validation confirms the utility of the developed approximations.