Inlet Gap Effect on Tonal Noise Generated from a Voluteless Centrifugal Fan
Journal article, 2022

In this study, three voluteless centrifugal fans are compared for their aeroacoustic performances. The tonal noise is predicted by coupling the IDDES with Formulation 1A of Farassat. The sources of the tonal noise at the blade passing frequency (BPF) are identified. It is found that the sources are related to the fan inlet gap, which introduces higher velocity intensities and turbulent fluctuations interacting with the blade leading edge. By redesigning the gap, the tonal noise at the BPF is reduced effectively.

voluteless centrifugal fan

gap turbulence

tonal noise

computational aeroacoustics

Author

Martin Ottersten

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Swegon Operations AB

Huadong Yao

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Lars Davidson

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

International Journal of Turbomachinery, Propulsion and Power

2504186X (eISSN)

Vol. 7 4 33

Reduction of noise from centriugal fans

Swegon, 2017-03-01 -- 2022-02-28.

Areas of Advance

Transport

Energy

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

Subject Categories

Other Physics Topics

Fluid Mechanics and Acoustics

Signal Processing

DOI

10.3390/ijtpp7040033

More information

Latest update

1/3/2024 9