Marcus Matthes’s research while affiliated with Visteon Corporation and other places

In this paper, we investigate the use of the variational formulation of Lighthill's anal- ogy, implemented in a Finite/Infinite Element framework. We present an innovative way to handle porous boundaries (or equivalently, control surfaces upon which aerodynamic sources are defined). We show how Lighthill's analogy can be used to predict broadband blower noise. Infinite elements are used to enforce the Sommerfeld radiation boundary condition. A derivation of the analogy is presented and is compared with the derivation of Curle's analogy (extended to handle porous boundaries). The implementation is described and is validated on a test case. Preliminary results on a real automotive HVAC blower case are presented.