Effect of Boundary Conditions and Source Truncation in the Prediction of Flow-generated Sound
نویسندگان
چکیده
The influence of the finiteness of the source domain on the application of Curle’s analogy for the computation of flow-generated sound is investigated in the present work. Two aspects are studied: the spurious source of sound induced by CFD boundary conditions in incompressible simulations and the error due to the truncation of the integration source domain. Two validation cases are investigated: a synthetic vortex street and the flow past a confined cylinder, both at low Mach number. The confined flow case presents specific difficulties, related to the presence of boundaries in the near-field of the quadrupolar sources and the existence of dipolar sources.
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