TY - GEN
T1 - A CFD-BEM coupling technique for low mach number flow induced noise
AU - Croaker, P.
AU - Kessissoglou, N.
AU - Marburg, S.
PY - 2013
Y1 - 2013
N2 - A technique to couple computational fluid dynamics (CFD) and boundary element method (BEM) models is proposed that allows the total sound pressure field produced by low Mach number flow past a rigid body to be predicted. An incompressible CFD solver is used to calculate the transient hydrodynamic flow field. Acoustic sources based on Lighthill's analogy are then extracted from the flow field data. The CFD/BEM coupling technique is used to compute the acoustic field incident on the body. The incident acoustic field is calculated based on a near-field solution of Lighthill's analogy, which employs numerical techniques to accurately evaluate singular and near-singular integrals. This incident field is combined with a BEM model of the cylinder to predict the scattered sound pressure field. The results from this CFD/BEM coupling technique are presented for flow past a circular cylinder with Reynolds number, Re D=100 and Mach number, M=0.02. The directivity of the sound pressure field at the vortex shedding frequency is compared with results of alternate methods available in the literature.
AB - A technique to couple computational fluid dynamics (CFD) and boundary element method (BEM) models is proposed that allows the total sound pressure field produced by low Mach number flow past a rigid body to be predicted. An incompressible CFD solver is used to calculate the transient hydrodynamic flow field. Acoustic sources based on Lighthill's analogy are then extracted from the flow field data. The CFD/BEM coupling technique is used to compute the acoustic field incident on the body. The incident acoustic field is calculated based on a near-field solution of Lighthill's analogy, which employs numerical techniques to accurately evaluate singular and near-singular integrals. This incident field is combined with a BEM model of the cylinder to predict the scattered sound pressure field. The results from this CFD/BEM coupling technique are presented for flow past a circular cylinder with Reynolds number, Re D=100 and Mach number, M=0.02. The directivity of the sound pressure field at the vortex shedding frequency is compared with results of alternate methods available in the literature.
UR - http://www.scopus.com/inward/record.url?scp=84903840774&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84903840774
SN - 9781632662682
T3 - Annual Conference of the Australian Acoustical Society 2013, Acoustics 2013: Science, Technology and Amenity
SP - 31
EP - 36
BT - Annual Conference of the Australian Acoustical Society 2013, Acoustics 2013
PB - Australian Acoustical Society
T2 - Annual Conference of the Australian Acoustical Society 2013: Science, Technology and Amenity, Acoustics 2013
Y2 - 17 November 2013 through 20 November 2013
ER -