Turbulence-induced noise of a submerged cylinder using a permeable FW–H method

Among underwater noise sources around submerged bodies, turbulence-induced noise has not been well investigated because of the difficulty of predicting it. In computational aeroacoustics, a number of studies has been conducted using the Ffowcs Williams–Hawkings (FW–H) acoustic analogy without consid...

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Bibliographic Details
Published in:International journal of naval architecture and ocean engineering 2016, 8(3), , pp.235-242
Main Authors: Choi, Woen-Sug, Choi, Yoseb, Hong, Suk-Yoon, Song, Jee-Hun, Kwon, Hyun-Wung, Jung, Chul-Min
Format: Article
Language:English
Subjects:
Acoustic analogy
Circular cylinder
OpenFOAM
Permeable FW–H method
Turbulence-induced noise
조선공학
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Summary:Among underwater noise sources around submerged bodies, turbulence-induced noise has not been well investigated because of the difficulty of predicting it. In computational aeroacoustics, a number of studies has been conducted using the Ffowcs Williams–Hawkings (FW–H) acoustic analogy without consideration of quadrupole source term due to the unacceptable calculation cost. In this paper, turbulence-induced noise is predicted, including that due to quadrupole sources, using a large eddy simulation (LES) turbulence model and a developed formulation of permeable FW–H method with an open source computational fluid dynamics (CFD) tool-kit. Noise around a circular cylinder is examined and the results of using the acoustic analogy method with and without quadrupole noise are compared, i.e. the FW–H method without quadrupole noise versus the permeable FW–H method that includes quadrupole sources. The usability of the permeable FW–H method for the prediction of turbulence-noise around submerged bodies is shown.
ISSN:2092-6782
2092-6790
DOI:10.1016/j.ijnaoe.2016.03.002