E3S Web Conf.
Volume 111, 2019CLIMA 2019 Congress
|Number of page(s)||7|
|Section||Indoor Environment Quality and Others|
|Published online||13 August 2019|
Investigations on noise sources on a contra-rotating axial fan with different modifications
1 INSTITUT FÜR LUFT- UND KÄLTETECHNIK gGmbH, Bertolt-Brecht-Allee 20, 01309 Dresden, Germany
2 GFAI TECH GmbH, Volmerstraße 3, 12489, Berlin, Germany
3 GFAI Gesellschaft zur Förderung angewandter Informatik e.V., Volmerstraße 3, 12489, Berlin, Germany
* Corresponding author: firstname.lastname@example.org
An Acoustic Camera was applied to examine modifications of fan blade designs regarding their noise emissions. A so-called rotational beamforming algorithm allows for the detection of sound sources on the rotating blades by using a virtual rotation of the microphones. Depending upon the frequency different sources could be localized. Both the leading and the trailing edge were modified. This paper shows the performed modifications and tests with the Acoustic Camera. It also presents first results and gives an outlook on future work.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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