Aeroacoustic simulation of a cross-flow fan using lattice Boltzmann method with a RANS model

Kazuya Kusano, Masato Furukawa, Kenichi Sakoda, Tomoya Fukui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, we developed an unsteady RANS approach based on the lattice Boltzmann method (LBM) to perform direct aeroacoustic simulations of low-speed fans at a lower computational cost compared with the conventional LBM-LES approach. In this method, the k-ω turbulence model is incorporated into the LBM flow solver, and the transport equations of k and ω are computed using the LBM, similar to the Navier-Stokes equations. In addition, moving boundaries, such as fan rotors, are considered using a direct-forcing immersed boundary method. This numerical method was validated through a two-dimensional simulation of a cross-flow fan. The simulation was able to capture an eccentric vortex structure in the rotor, and a pressure rise due to the work of the rotor could be reproduced. In addition, the peak sound of the blade-passing frequency was successfully predicted by the present method. Furthermore, the simulation results showed that the peak sound is generated by the interaction between the rotor blade and the flow around the tongue part of the casing.

Original languageEnglish
Title of host publicationProceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
EditorsTyler Dare, Stuart Bolton, Patricia Davies, Yutong Xue, Gordon Ebbitt
PublisherThe Institute of Noise Control Engineering of the USA, Inc.
ISBN (Electronic)9781732598652
DOIs
Publication statusPublished - 2021
Event50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021 - Washington, United States
Duration: Aug 1 2021Aug 5 2021

Publication series

NameProceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering

Conference

Conference50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021
Country/TerritoryUnited States
CityWashington
Period8/1/218/5/21

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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