September 19, 2025Proceedings

Numerical study of flow and acoustic modal characteristics of fan tonal source based on DMD

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DMD methods revealed significant differences in harmonic frequencies in the fan duct, enhancing understanding of tonal sources.
Numerical simulation using CFD and URANS effectively analyzed rotor-stator interactions contributing to tonal noise.
The study indicates a bottleneck in existing fan noise reduction technologies, necessitating new approaches for improvement.
Enhanced understanding of flow acoustic characteristics in fan systems may inform future noise reduction strategies.

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Study finds DMD effectively decomposes acoustic modes in fan ducts, highlighting noise reduction potential.

Zhang et al. (2025) studied this question.

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