AUTHORS: Karel Adámek, Jan Kolář, Pavel Peukert

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ABSTRACT: This feasibility study deals with use of flow numerical simulation for effectivity prediction of various designs of noise silencer, applied on the air exhaust of large volume flow and complicated by sticky parts contained in exhausted air. Important noise source are here thin metallic walls, excited by pressure pulsations of turbulent flow and a strong free flow with turbulent outer boundary, directed up in the free surroundings. The results demonstrate that several simple modifications decrease the flow kinetic energy at one quarter approx. of the actual value, therefore a specific noise level decreasing can be expected, too.

KEYWORDS: Turbulent air flow, flow numerical simulation, aerodynamic noise, noise suppression, flow dissipation

REFERENCES:

[1] K. Adamek, J. Kolar, M. Pustka, P. Pulpan, Noise reduction at the fan outlet, Proc. of the 2013 Int. Conf. on Energy, Environment, Ecosystems and Development, Rhodes island Greece, 2013, 4 pages.

[2] M. Pustka, V. Pulpan, Noise emission reduction at the outlet from painting shop, report VUTS Liberec, 2012, unpublished.

[3] N. Mastorakis, V. Mladenov (eds.), Computational problems in Engineering, Springer Int. Publishing Switzerland, 2014

[4] Kolar, J., Peukert, P., Adamek, K., Noise silencer of air exhaust, Int. Journal of Mathematics and Computers in Simulations, Nea Makri, Greece, 2017, 6 pages

[5] www.pap-pe.cz : Blasting by dry ice (Tryskání suchým ledem) and many other references

[6] Google maps