Multigrid acceleration of a high-resolution computational aeroacoustics scheme

Yusuf Özyörük, Lyle Norman Long

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A multigrid method is applied to a fourth-order accurate (spatially and temporally) finite difference RungeKutta time-marching scheme. This is used to solve the nonlinear Euler equations for the efficient prediction of noise radiation from turbofan engine inlets. This noise prediction approach computes a steady-state solution first, and then a source is turned on and the unsteady solution is computed. This has the advantage of using the same numerical scheme to evaluate the residuals of the governing equations in both the steady and unsteady calculations, which means that the steady-state solution is smooth and no numerical errors contaminate the acoustic solution. The highresolution steady-state flowfields are calculated efficiently using a full approximation storage multigrid method. This makes it to possible to attain steady-state solutions on extremely fine meshes designed for high-frequency turbofan noise problems. It is also shown that acoustic results for a JT15D inlet are accurately represented by the present approach.

Original languageEnglish (US)
Pages (from-to)428-433
Number of pages6
JournalAIAA Journal
Volume35
Issue number3
StatePublished - 1997

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Computational aeroacoustics
Acoustics
Turbofan engines
Euler equations
Acoustic noise
Radiation

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Cite this

Özyörük, Yusuf ; Long, Lyle Norman. / Multigrid acceleration of a high-resolution computational aeroacoustics scheme. In: AIAA Journal. 1997 ; Vol. 35, No. 3. pp. 428-433.
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Özyörük, Y & Long, LN 1997, 'Multigrid acceleration of a high-resolution computational aeroacoustics scheme', AIAA Journal, vol. 35, no. 3, pp. 428-433.

Multigrid acceleration of a high-resolution computational aeroacoustics scheme. / Özyörük, Yusuf; Long, Lyle Norman.

In: AIAA Journal, Vol. 35, No. 3, 1997, p. 428-433.

Research output: Contribution to journalArticle

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