Investigation of the influence of Lighthill's source term parts in an automotive turbocharger compressor

Clemens Freidhager, Stefan Schoder, Andreas Renz, Stefan Becker, Manfred Kaltenbacher

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


Lighthill’s inhomogeneous wave equation in combination with the Finite Element (FE) method is an adequate approach for computing pressure fluctuations inside a turbocharger compressor, giving multiple advantages. Firstly, computing fluctuations using FE are not influenced by numeric dissipation. Furthermore, this methodology allows investigating the influence of the additions connected to the compressor by interpolating Lighthill’s source terms onto different propagation grids. Lighthill’s source term consists of three different main parts (1) the Reynolds stress term, (2) the excess term, and (3) the viscous term. The influence of those three source term parts on propagation simulations in the inlet and outlet region of turbocharger compressors are investigated by comparing them with flow simulation results and measurements of a cold gas test rig. Furthermore, also the Ffowcs Williams-Hawkings approach was used applied for comparing simulation results.
Original languageEnglish
Title of host publicationTagungsband DAGA
Publication statusPublished - 20 Apr 2022
EventDAGA 2022 - 48. Jahrestagung für Akustik - Universität Stuttgart, Hybrider Event, Germany
Duration: 21 Mar 202224 Mar 2022


ConferenceDAGA 2022 - 48. Jahrestagung für Akustik
Abbreviated titleDAGA 2022
CityHybrider Event


Dive into the research topics of 'Investigation of the influence of Lighthill's source term parts in an automotive turbocharger compressor'. Together they form a unique fingerprint.

Cite this