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.
|Title:||Validation of a Zonal Approach Computing the Sound Radiation from Lined Ducts|
|Date:||12 December 2010|
|Journal or Publication Title:||AIAA Journal|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|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:||L AR - Aircraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L AR - Aircraft Research|
|DLR - Research theme (Project):||L - Simulation & Validation|
|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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