Lighthill’s analogy applied to an automotive turbocharger compressor

Clemens Freidhager, Stefan Schoder, Martin Heinisch, Manfred Kaltenbacher, Andreas Renz

Research output: Chapter in Book/Report/Conference proceedingConference paper


Computing transient CFD simulations of turbocharger compressors is computationally very demanding. It is of fundamental importance to resolve turbulent structures at the location of their generation and to establish a fine enough grid to allow propagation of the resolved structures. This results in high-resolution grids, existing of more than 20 million cells. Applying Lighthill's analogy, it is possible to only resolve turbulent structures at their location of generation and compute the pressure propagation by using an additional, not that demanding, acoustic grid. This allows using coarser CFD grids in the inlet and outlet section. For transferring Lighthill's source terms from the CFD to the acoustic grid, advanced interpolation algorithms are used. The simulation results are validated by measurements of a cold gas test rig are considered
Original languageEnglish
Title of host publicationINTER-NOISE and NOISE-CON Congress and Conference Proceedings
Publication statusPublished - 2021
Event50th International Congress and Exposition of Noise Control Engineering: INTER-NOISE 2021 - Washington DC, Virtuell, United States
Duration: 1 Aug 20215 Aug 2021


Conference50th International Congress and Exposition of Noise Control Engineering
Country/TerritoryUnited States


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