Towards the development of adaptive finite element methods for aeroacoustics
(English)Manuscript (preprint) (Other academic)
We report the latest results obtained in the development of an adaptive nite ele- ment method for computational aeroacoustics (CAA). The new methodology is based on the General Galerkin (G2) method, which has been successfully used for the computation of incompressible, turbulent ow. Here, we simulate the ow past an in-duct mixer plate and compare the results with available experimental data. The compar- isons include mean velocity pro les and frequency content of the turbulent signal. No direct simulation of sound or sound wave propagation has been performed; instead, simple analogy arguments have been used to extract acoustic results from incompressible simulations by assuming a direct correlation between the computed pressure drop signal and the sound at the far eld. We were able to reproduce the sound signal from experiments with our incompressible simulation and our results compared well with both the level and the broadband frequency peak of the measured sound. We suggest that the methodology presented here is mainly suitable for the prediction of sound in low Mach number pipe flows.
Computer and Information Science
IdentifiersURN: urn:nbn:se:kth:diva-58677OAI: oai:DiVA.org:kth-58677DiVA: diva2:473793
QS 201201102012-01-072012-01-072016-04-20Bibliographically approved