Premium
Analysis of Sound Radiated by Axisymmetric Vortex Ring
Author(s) -
Alexandru Dumitrache,
Horia Dumitrescu,
Florin Frunzulica
Publication year - 2010
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201010241
Subject(s) - vortex ring , vortex , vorticity , physics , mach number , rotational symmetry , turbulence , reynolds number , jet (fluid) , mechanics , ring (chemistry) , burgers vortex , starting vortex , classical mechanics , chemistry , organic chemistry
A theoretical and numerical study using the unsteady, 3D Navier‐Stokes equations to generate axisymmetric vortex rings is reported. Increasing the vorticity, the vortex ring transition to a turbulent state are analyzed. After transition to a turbulent stage, the self‐similarity of the temporal evolution of the flow is observed. Then we can compare sound radiated by the vortex ring to jet noise, at similar Reynolds number and low Mach number. The agreement between the simulation results and the simplified model is good. (© 2010 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)