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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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)|
|Title:||Simulation of open- and ducted-rotor noise using CAA-Multidomain method|
|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|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L RR - Rotorcraft Research|
|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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