Computational aeroacoustics of an axial fan with leading edge serrations

Schoder S, Krömer F, Weitz M, Kaltenbacher M, Becker S (2019)


Publication Type: Conference contribution

Publication year: 2019

Publisher: International Commission for Acoustics (ICA)

Book Volume: 2019-September

Pages Range: 1867-1873

Conference Proceedings Title: Proceedings of the International Congress on Acoustics

Event location: Aachen DE

ISBN: 9783939296157

DOI: 10.18154/RWTH-CONV-238822

Abstract

In recent years, a trend towards modifications of the leading edge geometry in airfoils to reduce the sound emission and improve the stall behavior has been observed. However, low-pressure axial fan design methodologies for a decreased sound radiation rely almost exclusively on the use of fan blade skew rather than on leading edge modifications so far. Therefore, with this study we aim to investigate the sound reduction capabilities of leading edge serrations applied to low-pressure axial fans using the efficient perturbed convective wave equation. For this purpose, we use a reference fan with straight leading edges and a fan with serrated leading edges that has been studied in experimental investigations before. The comparison of the CFD and CAA simulations with experimental results show excellent agreement. Furthermore, we analyze the sound reduction mechanisms of leading edge serrations based on the CAA results. In general, a sound reduction is obtained with leading edge serrations without influencing the fan operating point. The study demonstrates the applicability of this aeroacoustic approach for axial fans with modified leading edges.

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APA:

Schoder, S., Krömer, F., Weitz, M., Kaltenbacher, M., & Becker, S. (2019). Computational aeroacoustics of an axial fan with leading edge serrations. In Martin Ochmann, Vorlander Michael, Janina Fels (Eds.), Proceedings of the International Congress on Acoustics (pp. 1867-1873). Aachen, DE: International Commission for Acoustics (ICA).

MLA:

Schoder, Stefan, et al. "Computational aeroacoustics of an axial fan with leading edge serrations." Proceedings of the 23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019, Aachen Ed. Martin Ochmann, Vorlander Michael, Janina Fels, International Commission for Acoustics (ICA), 2019. 1867-1873.

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