FINITE ELEMENT AND BOUNDARY ELEMENT MODELLING FOR THE ACOUSTIC WAVE TRANSMISSION IN MEAN FLOW MEDIUM
作者： T. TSUJI , T. TSUCHIYA , Y. KAGAWA
关键词:
摘要: The frequency characteristics of the acoustic wave transmission in a medium with mean flow are considered. One approach is to solve Helmholtz equation original co-ordinates, which directly discretized for one-dimensional and axisymmetric FEM. Another transform into standard equation, FEM three-dimensional BEM. numerical models examined first straight circular duct. solutions by approaches compared analytical solution. examination then extended case when locally present muffler expansion chamber. To model spatial BEM model, partitioned domain also developed. No shear effect between two regions included.
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