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M. Kaltenbacher, S. Schoder:
"Aeroacoustic formulation for flow-acoustic feedback";
in: "25rd AIAA/CEAS Aeroacoustics conference", AIAA, 2019, ISBN: 978-1-62410-588-3.

Using existing aeroacoustic wave equations, we propose a general hybrid aeroacoustic
method, based on compressible flow data. By applying the Helmholtz-Hodge decomposition
on arbitrary domains, we extract the incompressible projection (non-radiating base flow)
of the compressible flow velocity by solving the vector valued curl-curl equation with the
vorticity as forcing term. The resulting vortical flow part is used for computing the acoustic
source term. Computations of the aeroacoustic benchmark case, cavity with a lip, which
involve acoustic feedback, show promising results.

CAA

http://dx.doi.org/10.2514/6.2019-2672