Numerical alogorithms for acoustic integrals the devil is in the details

Research output: Contribution to conferencePaperpeer-review

30 Scopus citations


The accurate prediction of the aeroacoustic field generated by aerospace vehicles or nonaerospace machinery is necessary for designers to control and reduce source noise. Powerful computational aeroacoustic methods, based on various acoustic analogies (primarily the Lighthill acoustic analogy) and Kirchhoff methods, have been developed for prediction of noise from complicated sources, such as rotating blades. Both methods ultimately predict the noise through a numerical evaluation of an integral formulation. In this paper, we consider three generic acoustic formulations and several numerical algorithms that have been used to compute the solutions to these formulations. Algorithms for retarded-time formulations are the most efficient and robust, but they are difficult to implement for supersonic-source motion. Collapsing-sphere and emission-surface formulations are good alternatives when supersonic source motion is present, but the numerical implementations of these formulations are more computationally demanding. New algorithms—which utilize solution adaptation to provide a specified error level—are needed.

Original languageEnglish (US)
StatePublished - 1996
Event2nd AIAA/CEAS Aeroacoustics Conference, 1996 - State College, United States
Duration: May 6 1996May 8 1996


Other2nd AIAA/CEAS Aeroacoustics Conference, 1996
Country/TerritoryUnited States
CityState College

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Aerospace Engineering


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