Aeroacoustic Simulation of the Noise radiated by an Helmholtz Resonator placed in a Duct

The quintessential aeroacoustic test case of an Helmholtz resonator was studied, deploying the recently released coupling between the Engineering design tools STAR-CD (a CFD code) and Actran/LA (a CA code). The objective, to accurately model both the frequency and magnitude of the aeroacoustic resonance phenomenon in the geometry as compared with both experimental and analytical data, was achieved. This paper presents the methodology used, demonstrates the importance of accurate representation of compressible effects in CFD, and presents methods to optimise the data transfer between the codes by focusing on the dominant source regions.