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Comparison of computational aeroacoustics with theory using the benchmark case of sound waves excited from a semi-infinite duct

  1. Daniel Morgenweck*,
  2. Christoph Schemel,
  3. Frank Thiele

Article first published online: 13 DEC 2004

DOI: 10.1002/pamm.200410245

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PAMM

PAMM

Volume 4, Issue 1, pages 528–529, December 2004

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How to Cite

Morgenweck, D., Schemel, C. and Thiele, F. (2004), Comparison of computational aeroacoustics with theory using the benchmark case of sound waves excited from a semi-infinite duct. Proc. Appl. Math. Mech., 4: 528–529. doi: 10.1002/pamm.200410245

Author Information

  1. Hermann Föttinger Institut für Strömungsmechnik, Müller Breslau Str. 8, 10623 Berlin

*Phone: +49 30 314 24733

Publication History

  1. Issue published online: 13 DEC 2004
  2. Article first published online: 13 DEC 2004

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Abstract

In this paper the benchmark problem of radiation from a semi infinite duct is discussed. The duct is modeled by an infinitesimal thin wall. Comparisons are made between the analytic solutions of R. M. Munt and the 2nd CAAWorkshop with our CAA-code. In all cases a 3D axisymmetric approach is chosen to describe the propagation of a single mode. The procedure consists of two steps. Step 1 concerns a numerical simulation of the near-field-region. Step 2 calculates the farfield-solution by means of the acoustic-analogy of FfowcsWilliams and Hawkings. Since the wall is of infinitesimal thickness, the edge needs to be treated in a special way. Two different approaches are persecuted and the results are compared. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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