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Simulation of open- and ducted-rotor noise using CAA-Multidomain method

Yin, J. (2001) Simulation of open- and ducted-rotor noise using CAA-Multidomain method. NATO RTO-AVT Symposium on Aging Mechanisms and Control, Part A - Developments in Computational Aero- and Hydro-Acoustics, Manchester (uk), 8.-12. Oktober 2001.

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Abstract

The sound field generated by an open rotor and that radiated by the same rotor placed inside a semi-infinite duct is simulated using a Computational Aeroacoustic (CAA) multi-domain method. The linearized Euler equations in cylindrical coordinates are used as governing equations in solving this problem. Both Tam's radiation and PML boundary conditions are used. Comparisons of results by using the two different far-field boundary conditions will be given. A multi-domain Cartesian grid system is used so that the number of grid points can be kept as a minimum. A combination of DRP and a specially optimized cell-centered high order differencing scheme is implemented in the area of two Cartesian grid interfaces. The effect of mean flow including a shear layer on the noise radiation off the ducted rotor is studied.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2002,
Title:Simulation of open- and ducted-rotor noise using CAA-Multidomain method
Authors:
AuthorsInstitution or Email of Authors
Yin, J.UNSPECIFIED
Date:2001
Status:Published
Keywords:CAA, CAA-multi-domain, open-/duct-rotor noise, grid interface treatment
Event Title:NATO RTO-AVT Symposium on Aging Mechanisms and Control, Part A - Developments in Computational Aero- and Hydro-Acoustics, Manchester (uk), 8.-12. Oktober 2001
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Quiet and Comfortable Rotorcraft
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 18:58

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