On the fluid mechanical and acoustic mechanisms of serrated leading edges

Becker S, Riedel J, Kaltenbacher M, Schoder S, Czwielong F (2022)

Publication Type: Conference contribution, Conference Contribution

Publication year: 2022

Conference Proceedings Title: FAN 2022

Event location: Senlis

Open Access Link: https://www.fan2025.org/archives/fan2022/papers/fp-pdf-99-RIEDEL.pdf

Abstract

On the basis of experimental investigations, numerical flow simulations were carried out on a
fan with leading edge serrations. The fan operates in turbulent inflow and a good agreement
with the experiment could be achieved. It was found that leading-edge serrations generate
longitudinal vortices that are temporally and spatially stable and thus improve the flow over the
airfoil. In addition, a vortex could be generated which reduces the leakage across the tip gap.
The stabilization of the flow over the blade reduces the pressure fluctuations on the blade
surface, which in turn leads to less sound radiation. The found physical mechanisms of
serrations have great effects on simple fan geometry, but are reduced in optimized fans, which
weaken their positive effects on the flow field and the sound emission.

Authors with CRIS profile

Stefan Becker Lehrstuhl für Prozessmaschinen und Anlagentechnik (iPAT) Jörg Riedel Lehrstuhl für Prozessmaschinen und Anlagentechnik (iPAT) Felix Czwielong Lehrstuhl für Prozessmaschinen und Anlagentechnik (iPAT)

Involved external institutions

Technische Universität Graz

Austria (AT)

How to cite

APA:

Becker, S., Riedel, J., Kaltenbacher, M., Schoder, S., & Czwielong, F. (2022). On the fluid mechanical and acoustic mechanisms of serrated leading edges. In FAN 2022. Senlis, FR.

MLA:

Becker, Stefan, et al. "On the fluid mechanical and acoustic mechanisms of serrated leading edges." Proceedings of the FAN 2022 – International Conference on Fan Noise, Aerodynamics, Applications and Systems, Senlis 2022.

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