Title
Prediction of the flow-induced noise for practical applications using the SNGR method
Author
Snellen, M.
van Lier, L.J.
Golliard, J.
Védy, E.
Technisch Physische Dienst TNO - TH
Contributor
Nilson, A. (editor)
Boden, H. (editor)
Publication year
2003
Abstract
In this paper an engineering method for the prediction of noise generated by a turbulent flow is presented. The presented approach is based on the assumption that the acoustic phenomena do not provide feedback to the turbulence. Thus, parameters such as the turbulent kinetic energy and the integral length scale can be obtained from Reynolds Averaged Navier Stokes (RANS) simulations. Subsequently an SNGR approach is employed for generating an unsteady turbulent velocity distribution that possesses these turbulent characteristic values. Since the propagation of sound is little influenced by turbulent and viscous effects it can be described by the Euler equations. These Euler equations are solved on an unstructured grid, allowing for arbitrarily complex geometries. Results of simulations employing this Computational Aero Acoustics approach for several applications are compared with measurements, showing good agreement.
Subject
Acoustic wave velocity
Aerodynamics
Computational fluid dynamics
Kinetic energy
Mirrors
Pressure effects
Reynolds number
Turbulent flow
Wind tunnels
Autonomous source
Computational aero acoustics (CAA)
Reynolds averaged navier stokes (RANS) simulations
SNGR method
Acoustic noise
To reference this document use:
http://resolver.tudelft.nl/uuid:e4fab0f9-2f53-4c0f-9486-767b910be2af
TNO identifier
237463
Source
Proceedings of the Tenth International Congress on Sound and Vibration, 7-10 July 2003, Stockholm, Sweden, 3859-3866
Document type
conference paper