Aeroacoustic source characterization at fan test facility with spherical harmonics of the half-space
Journal article, 2025
Acoustic measurements of sources in non-ideal acoustic environments, often the case in industrial product development, issue challenges in source characterization. This study investigates the room-acoustical effects of a bespoke fan test facility on aeroacoustic source characterization via a second-order scheme of spherical harmonics of the half-space. An experimental test of a compact monopole-like sound source reveals the influence of the room's transfer function at low frequencies. Applying the scheme to a benchmark case of a low-pressure axial fan at different loading conditions showcases a satisfactory estimation of sound power and directivity.
Acoustic measurements and instrumentation
Acoustic signal processing
Acoustical effects
Microphones
Architectural acoustics
Acoustic noise measurement
Acoustical properties
Acoustic ecology
Aeroacoustics
Inverse-square law
Author
Michail Vourakis
Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics
Franz Zotter
Kunst-Universität Graz
Eric Brandão
Federal University of Santa Maria
Elias Zea
Royal Institute of Technology (KTH)
Jasa Express Letters
26911191 (eISSN)
Vol. 5 5 052802eFan, a key enabler for eMobility, part II
Swedish Energy Agency (2020-016065), 2020-10-01 -- 2024-09-30.
Subject Categories (SSIF 2025)
Fluid Mechanics
DOI
10.1121/10.0036723
PubMed
40377522
Related datasets
Aeroacoustic source characterization at fan test facility with spherical harmonics of the half-space [dataset]
DOI: 10.5281/zenodo.15292362