Experimental investigation of the influence of different leading edge modifications on the sound emission of axial fans downstream of a heat exchanger
Czwielong F, Krömer F, Paruchuri C, Becker S (2019)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2019
Publisher: Deutsche Gesellschaft für Akustik e.V. (DEGA)
City/Town: Berlin
Pages Range: 1-8
Event location: Aachen
ISBN: 978-3-939296-15-7
URI: http://pub.dega-akustik.de/ICA2019/data/articles/001182.pdf
Open Access Link: http://pub.dega-akustik.de/ICA2019/data/articles/001182.pdf
Abstract
Axial fans have a major impact on the sound emission of technical systems. One of the common applications
of low-pressure axial fans is their usage in air conditioning and cooling circuits. In most cases the fan operates
downstream of a heat exchanger in this scheme. The suction side heat exchanger changes the upstream flow field of the fan, often resulting in an increase in the sound pressure level of the axial fan compared to undisturbed inflow conditions. Investigations on sound radiation of aerorfoils showed that leading-edge modifications like serrations or slits reduce the turbulence-aerofoil interaction noise. In this study, the impact of two different leading-edge modifications (sinusoidal and slit) on the sound emissions of a forward skewed low-pressure axial fan was examined. The inflow conditions varied between a free inflow and a disturbed inflow, generated by a heat exchanger located on the suction side of the axial fan. The results show that the modification of the leading edge has a positive influence on the sound radiation of the axial fan for both inlet conditions discussed above.
Authors with CRIS profile
Felix Czwielong
Lehrstuhl für Prozessmaschinen und Anlagentechnik
Florian Zenger
Lehrstuhl für Prozessmaschinen und Anlagentechnik
Stefan Becker
Lehrstuhl für Prozessmaschinen und Anlagentechnik
Additional Organisation(s)
Involved external institutions
United Kingdom (GB)How to cite
APA:
Czwielong, F., Krömer, F., Paruchuri, C., & Becker, S. (2019). Experimental investigation of the influence of different leading edge modifications on the sound emission of axial fans downstream of a heat exchanger. In Deutsche Gesellschaft für Akustik e.V. (DEGA) (Eds.), Proceedings of the Proceedings of the 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019 (pp. 1-8). Aachen: Berlin: Deutsche Gesellschaft für Akustik e.V. (DEGA).
MLA:
Czwielong, Felix, et al. "Experimental investigation of the influence of different leading edge modifications on the sound emission of axial fans downstream of a heat exchanger." Proceedings of the Proceedings of the 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019, Aachen Ed. Deutsche Gesellschaft für Akustik e.V. (DEGA), Berlin: Deutsche Gesellschaft für Akustik e.V. (DEGA), 2019. 1-8.
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