Influence of the shroud leading edge shape on the axial-fan noise
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F20%3A00344630" target="_blank" >RIV/68407700:21220/20:00344630 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.11159/htff20.164" target="_blank" >https://doi.org/10.11159/htff20.164</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.11159/htff20.164" target="_blank" >10.11159/htff20.164</a>
Alternative languages
Result language
angličtina
Original language name
Influence of the shroud leading edge shape on the axial-fan noise
Original language description
The paper is focused on the noise reduction of the low-pressure axial fan by the modification of the shroud leading edge shape. The CFD and CAA simulation of the fan are performed in commercial software PowerFLOW based on the Lattice Boltzmann method. The propagation of the acoustics waves to the far-field was carried out by the Ffowcs-Williams & Hawkings acoustics analogy. The far-field acoustics data from the simulation match with the results from the ISO measurement in the semi-anechoic chamber. Direct acoustics results of the near-field capture dominant noise sources of the cooling axial fan in blade tip area. Vortexes produced by the flow separation from the shroud inlet edge are carried by the rotating fan blade. The interaction of these flow structures with the blade tip surface produce strong subharmonic component in the acoustic spectra with lower frequency compared to blade passing frequency. Four different shrouds geometry modifications are analyzed. The modification of the shape eliminates subharmonic component of the fan sound spectra and reduces overall fan noise.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20302 - Applied mechanics
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 6th World Congress on Mechanical, Chemical, and Material Engineering (MCM’20)
ISBN
978-1-927877-66-1
ISSN
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e-ISSN
2369-8136
Number of pages
8
Pages from-to
1-8
Publisher name
Avestia Publishing, International ASET Inc.
Place of publication
Ottawa
Event location
online
Event date
Aug 16, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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