Unsteady Simulation of Tonal Noise from Isolated Centrifugal Fan
Preprint, 2020

In this study, an isolated centrifugal fan is investigated for the aerodynamic and acoustic performances using RANS and URANS simulations. The noise is predicted by coupling the URANS and the Ffowcs Williams and Hawkings acoustic analogy. The aerodynamic properties obtained from RANS and URANS are consistent with the experimental data. The magnitudes of the tonal noise at the blade passing frequencies are well predicted. Recirculating flows, which are responsible for reducing the fan efficiency and increasing the noise generation, are observed between the shroud and the blade trailing edges. It is found that the recirculating flows are associated with the gap between the shroud and the inlet duct.

noise reduction

computational aeroacoustics

turbulence modelling

voluteless centrifugal fan

Författare

Martin Ottersten

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Huadong Yao

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Lars Davidson

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Minskning av ljud från centrifugalfläktar

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

Styrkeområden

Transport

Energi

Ämneskategorier

Rymd- och flygteknik

Farkostteknik

Strömningsmekanik och akustik

DOI

10.31224/osf.io/yx7rj

Mer information

Senast uppdaterat

2021-07-17