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.
|Publication status||Published - 22 May 2019|