Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14443
Title: Prediction of flow-generated noise produced by acoustic and aerodynamic interactions of multiple in-duct elements
Authors: Han, N
Mak, CM 
Keywords: Acoustic and aerodynamic interactions
Flow-generated noise
Multiple in-duct elements
Issue Date: 2008
Publisher: Pergamon Press
Source: Applied acoustics, 2008, v. 69, no. 6, p. 566-573 How to cite?
Journal: Applied acoustics 
Abstract: Flow-generated noise problem caused by in-duct elements is due to the complicated acoustic and turbulent interactions of multiple in-duct flow noise sources. The approach of partially coherent sound fields used previously by Mak and Yang [C.M. Mak, J. Yang, Flow-generated noise radiated by the interaction of two strip spoilers in a low speed flow ducts, Acta Acust united with Acustica 88 (2002) 861-868] and Mak [C.M. Mak, A prediction method for aerodynamic sound produced by multiple elements in air ducts, J Sound Vib 287 (2005) 395-403] is adopted to formulate the sound powers produced by interactions of multiple elements at frequencies below and above the cut-on frequency of the lowest transverse duct mode. The study indicates that the level and spectral distribution of the additional acoustic energy produced by the interactions of multiple elements can be predicted based on the measured data with respect to the interactions. The proposed method can form a basis of a generalized prediction method for flow-generated noise produced by multiple elements. The application of the proposed method is supported by two engineering examples.
URI: http://hdl.handle.net/10397/14443
ISSN: 0003-682X
EISSN: 1872-910X
DOI: 10.1016/j.apacoust.2007.01.001
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