Isoparametric finite element using cubic hermite polynomials for acoustics in duct components with flow
Keywords:
acoustic wave propagation, aeroacoustics, channel flow, finite element analysis, resonance, isoparametric finite elements, cubic hermite polynomials, finite element model, duct system components, acoustic resonant frequencies, hard walled cavities, acoustic propagation characteristics, duct bends, junctions, higher order mode propagation, convective effect, low Mach number air flowAbstract
Describes the development of a new finite element model to analyse the propagation of sound through duct system components. The element model was first tested by predicting the acoustic resonant frequencies of hard walled cavities. It was then used to predict the acoustic propagation characteristics of duct bends and junctions, including higher order mode propagation in attached straight ducts, and the convective effect of low Mach number air flow
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