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Validation of a Zonal Approach Computing the Sound Radiation from Lined Ducts

Buske, Clemens and Richter, Christoph and Thiele, Frank and Yu, Chao and Zhuang, Mei (2010) Validation of a Zonal Approach Computing the Sound Radiation from Lined Ducts. AIAA Journal, Vol. 48 (No. 12), pp. 2899-2908. DOI: 10.2514/1.J050478.

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A zonal approach for the prediction of the far-field radiation from flows in lined ducts is investigated. The approach combines a high-order computational aeroacoustics scheme with the recently developed acoustic intensitybased method for the calculation of far-field radiations. The advantage over the application of an acoustic analogy is the usage of an open control surface for the acoustic input. The capability of the current hybrid approach was validated on the basis of two benchmark cases. One considers the sound radiation from a two-dimensional semiinfinite duct in which a small fraction of the walls close to outlet nozzle is lined. The second problem concerns the sound radiation from a bypass enginelike annular duct with lined and hardwalled configurations of the infinite centerbody and sheared flow conditions. A broadband time-domain impedance boundary condition based on the extended Helmholtz resonator model and the Ingard–Myers boundary condition is implemented in the computational aeroacoustic code to model the acoustic linings. Although mesh refinement may improve the solutions, the good agreements of analytical solutions and numerical results, in particular for the radiation characteristics, verify this approach as an accurate and efficient prediction tool.

Document Type:Article
Title:Validation of a Zonal Approach Computing the Sound Radiation from Lined Ducts
AuthorsInstitution or Email of Authors
Buske, ClemensDLR
Richter, ChristophTU Berlin
Thiele, FrankTU Berlin
Yu, ChaoPPG Industries
Zhuang, MeiOhio State University
Date:12 December 2010
Journal or Publication Title:AIAA Journal
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Volume:Vol. 48
Page Range:pp. 2899-2908
Keywords:Computational Aeroacoustics, Duct Flow, Far-Field Sound Prediction
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation
Location: Göttingen
Institutes and Institutions:Institute of Propulsion Technology
Deposited By: Clemens Buske
Deposited On:03 Feb 2011 12:00
Last Modified:26 Mar 2013 13:26

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