Date on Master's Thesis/Doctoral Dissertation
12-2015
Document Type
Master's Thesis
Degree Name
M.S.
Department
Mechanical Engineering
Degree Program
Mechanical Engineering, MS
Committee Chair
Richards, Chris
Committee Member
Lian, Yongsheng
Committee Member
Berson, Eric
Author's Keywords
CAA; CFD; radial fan; aeroacoustics
Abstract
A study was conducted to investigate the predictive capability of computational aeroacoustics with respect to a shrouded, subsonic, radial fan. A three dimensional unsteady fluid dynamics simulation was conducted to produce aerodynamic data used as the acoustic source for an aeroacoustics simulation. Two acoustic models were developed: one modeling the forces on the rotating fan blades as a set of rotating dipoles located at the center of mass of each fan blade and one modeling the forces on the stationary fan shroud as a field of distributed stationary dipoles. Predicted acoustic response was compared to experimental data. The blade source model predicted overall far field sound power levels within 7 dBA and the shroud model predicted overall far field sound power levels within 14 dBA. Doubling the density of the computational fluids mesh and using a scale adaptive simulation turbulence model increased broadband noise accuracy. However, computation time doubled and the accuracy of the overall sound power level prediction improved by only 1 dBA.
Recommended Citation
Buccieri, Bryan, "Application of the aeroacoustic analogy to a shrouded, subsonic, radial fan." (2015). Electronic Theses and Dissertations. Paper 2329.
https://doi.org/10.18297/etd/2329
