Prediction of flow induced noise in rotating devices using nonmatching grids

Jens Grabinger, Branimir Karic, Simon Triebenbacher, Manfred Kaltenbacher, Stefan Becker, Reinhard Lerch
<span title="">2008</span> <i title="Acoustical Society of America (ASA)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/hwn3tbm3t5cpnjcflcmmwnprc4" style="color: black;">Journal of the Acoustical Society of America</a> </i> &nbsp;
Acoustics 08 Paris 4065 With increasing number of electrical devices, e.g. air conditioning systems, used in homes and offices, noise pollution is becoming a more and more relevant topic. A large amount of this noise is generated by turbulent flows and laminar flows at leading and trailing edges, where mainly tonal noise is generated. The objective of our contribution is to simulate the generation as well as the propagation of noise inside of rotating devices. The acoustic source terms are
more &raquo; ... ned from the fluid dynamics solution by using Lighthill's acoustic analogy. The acoustic domain is decomposed into a rotating part and a fixed part. The coupling between these two parts is enforced at their interface by a mortar finite element method, which uses Lagrange multipliers in order to "glue" the geometrically independent parts together. The mortar method takes into account the movement of the rotating part by a moving nonmatching grid, that is recomputed at each time step.
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