Aeroacoustic simulation of broadband sound generated from a cross-flow fan using immersed boundary-lattice Boltzmann method

K. Kusano, M. Furukawa, K. Sakoda, T. Fukui

Research output: Contribution to journalConference articlepeer-review

Abstract

In this study, we investigated the capability of the immersed boundary-lattice Boltzmann method (IB-LBM) in simulating the broadband sound generated from a cross-flow fan. The present method is based on the lattice Boltzmann equation with the D3Q27 particle velocity model, and the cascaded collision operator was used to stably simulate high-Reynolds-number flows. Furthermore, the direct-forcing approach was used to consider rotating blades in the regular lattice. To capture turbulence eddies in the rotor, we used a high-resolution grid that contained approximately 340 million nodes. The simulation successfully captured the fundamental flow features of the cross-flow fan such as the eccentric vortex, and the simulation results were consistent with the experimental results in terms of the time-averaged velocity distribution at the outlet of the fan. In addition, by resolving turbulent eddies in the impeller, the simulation successfully predicted the broadband sound spectrum in the frequency range of 2 kHz or less.

Original languageEnglish
Article number012033
JournalJournal of Physics: Conference Series
Volume2217
Issue number1
DOIs
Publication statusPublished - May 6 2022
Event16th Asian International Conference on Fluid Machinery, AICFM 2021 - Virtual, Online
Duration: Sep 13 2021Sep 15 2021

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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