Analytical acoustic pressure gradient prediction for moving medium problems

Ghader Ghorbaniasl, Huang Zhongjie, Leonidas Siozos-Rousoulis, Christian Lacor

Onderzoeksoutput: Articlepeer review

26 Citaten (Scopus)

Samenvatting

In this paper, an acoustic pressure gradient formula capable of accounting for constant uniform flow effects is suggested. Acoustic pressure gradient calculation is key for acoustic scattering problems, because it may be used to evaluate the hardwall boundary condition. Realistic cases of rotating
machines may be evaluated in a moving frame of reference and as such, an acoustic pressure gradient formula capable of accounting for constant uniform flow effects finds significant application. A frequency domain formulation was thus derived for periodic noise source motion located in a moving medium. The suggested formula is mathematically compact and easy to implement. It may offer us significant advantages when tonal noise emissions are dominant, thus finding application potential in acoustic scattering problems in rotating machines in a constant uniform flow. Moreover, the formula contains no Doppler factor, thus facilitating noise prediction for sources in supersonic motion.
Originele taal-2English
Aantal pagina's14
TijdschriftProceedings of the Royal Society A
Volume471
Nummer van het tijdschrift2184
DOI's
StatusPublished - 10 dec 2015

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