A Review of Time- Domain Impedance Modelling and Applications
Richter, Chr. and Abdel Hay, J. and Panek, L. and Schönwald, N and Busse, St. and Thiele, F. (2011) A Review of Time- Domain Impedance Modelling and Applications. Journal of Sound and Vibration, 330 (16), pp. 3859-3873. Elsevier Ltd.. DOI: 10.1016/j.jsv.2011.04.013. ISSN 0022-460X.
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Time-domain impedance boundary conditions are reviewed and similarities between the models are shown. The extended Helmholtz resonator model is used with a time-domain impedance boundary condition for impedance eduction and simulation of the noise radiation from a lined aeroengine nozzle. Model parameters obtained by impedance eduction from flow duct measurements and then used to predict the noise radiation for realistic aeroengine nozzle flow and geometry. The prediction of sound radiation from a coaxial jet nozzle at approach conditions with the educed model parameters is performed in 2D and 3D. Various features of the numerical method that enable it to be used for realistic applications are presented. This in-cludes the suppression of flow instabilities in the linear inviscid solution and analysis of the solution to prove the global conservation of acoustic energy in each individual result. It is found that the current approach is too time consuming for optimisation, even for a 2D simulation using parallel processing. Thus, finally the potential of port-ing a CAA method to the graphics processing unit (GPU) is shown in one example. The GPU based computation is about 100 times faster. The results are encouraging, even though the GPU variant needs further validation.
|Title:||A Review of Time- Domain Impedance Modelling and Applications|
|Journal or Publication Title:||Journal of Sound and Vibration|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 3859-3873|
|Series Name:||Computational, Aero-Acoustics (CAA) for Aircraft noise prediction - Part A|
|Keywords:||Liner, Modelle, Anwendungen, Impedanz, CAA, GPU|
|HGF - Research field:||Energy, Aeronautics, Space and Transport|
|HGF - Program:||Efficient Energy Conversion, Aeronautics|
|HGF - Program Themes:||E VG - Combustion and Gas Turbine Technologies, L ER - Engine Research|
|DLR - Research area:||Energy, Aeronautics|
|DLR - Program:||E VG - Combustion and Gas Turbine Technologies, L ER - Engine Research|
|DLR - Research theme (Project):||E - Gasturbine (old), L - Combustion Chamber Technologies|
|Institutes and Institutions:||Institute of Propulsion Technology > Engine Acoustic|
|Deposited By:||Balbir Kaur|
|Deposited On:||20 Jan 2012 15:06|
|Last Modified:||07 Feb 2013 20:35|
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