Scholarly record
NUMERICAL ANALYSIS OF RESONATOR CONFIGURATION FOR ACOUSTIC AGGLOMERATION
Abstract
This study presents a numerical analysis of resonator configurations for acoustic agglomeration in air purification applications. The efficiency of acoustic agglomeration is determined by the spatial distribution of acoustic pressure, which is controllably modified through mechanically deformable resonators. The investigation employs finite element analysis in a sequential multiphysics approach (ANSYS Workbench), comprising modal analysis for natural frequencies and mode shapes, harmonic acoustic analysis for deformation and pressure distribution modeling, and parametric configuration comparison. Rod-type resonators (circular, square, rectangular, triangular, elliptical cross-sections) and plate-type resonators with characteristic dimensions of 0,1-0,5 mm were investigated. Modal analysis revealed that decreasing rod characteristic dimension from 0,5 to 0,1 mm increases mean deformation by 60-80%. Plate resonators demonstrate more stable modal response with deformation variation CV=0,31 versus CV=0,54-0,71 for rods. The key finding establishes critical influence of spacing on acoustic system response. For plate resonators, decreasing inter-plate spacing tp from 8,4 mm to 2,1-3,0 mm increases maximum deformation from 5,8*10-10 m to almost 8*10-9 m (12-14 fold increase) while forming structured pressure field. Further reduction to tp=0,3 mm decreases deformation to 1,05*10-9 m due to mechanical confinement but elevates pressure to 426 Pa. For rod resonators, transition from standing-wave resonance regime for tr=7 mm (Pmax=736 Pa, wmax=2,16*10-9 m) to intensive acoustic energy absorption regime occurs when spacing decreases to tr=0.6 mm, where deformation reduces to 3,33*10-11 m, indicating a regime in which the acoustic wave energy is almost entirely transferred into mechanical oscillations of the resonators, resulting in a strongly attenuated acoustic field within the domain. Transitional regime is observed at tr=1,8 mm with deformation 1,93*10-10 m and pressure 200 Pa.
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References11
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