Sound Emissions of Axial Fans with Leading-Edge Serrations on different spanwise Locations

Czwielong F, Krömer F, Becker S (2019)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2019

Conference Proceedings Title: PROCEEDINGS OF INTERNOISE 2019 The 49th International Congress and Exhibition on Noise Control Engineering

Event location: Madrid ES

Abstract

Axial fans are used in a variety of technical systems such as air conditioners,
trains, cars and ventilation systems. In these systems, axial fans are a dominant
source of noise. Based on the investigations of flat-plate fans and airfoils, it has
been found that serrated leading edges reduce the sound radiation compared
with a straight leading edge. In this study, the sound emission of axial fans with
leading-edge serrations, applied to dierent spanwise locations of the fan blade,
was investigated. For that three fans with different leading-edge configurations
(fully serrated, serrations on the outer 2/3 and 1/3 of the fan blade) and a reference
fan without serration were examined experimentally. The results showed that
leading-edge serrations influence the sound emissions of the axial fans. For high
volume flow rates, the serrations led to a reduction of the sound radiation - the fan
with serrations on the full span showed the highest sound reduction. For low volume
flow rates, the sound emission was increased with the leading-edge serrations.

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)

Lehrstuhl für Prozessmaschinen und Anlagentechnik

How to cite

APA:

Czwielong, F., Krömer, F., & Becker, S. (2019). Sound Emissions of Axial Fans with Leading-Edge Serrations on different spanwise Locations. In PROCEEDINGS OF INTERNOISE 2019 The 49th International Congress and Exhibition on Noise Control Engineering. Madrid, ES.

MLA:

Czwielong, Felix, Florian Krömer, and Stefan Becker. "Sound Emissions of Axial Fans with Leading-Edge Serrations on different spanwise Locations." Proceedings of the inter.noise 2019, Madrid 2019.

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