A hybrid method for the simulation of aeroacoustic effects induced by rigid body motion in turbulent flow
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In the present work an approach for the simulation of aeroacoustic effects induced by the interaction of a turbulent ﬂow with moving structures is presented. The aeroacoustic sound ﬁeld computation is based on an acoustic/viscous splitting approach. Acoustic radiation is computed based on the linearized Euler equations (LEE) and acoustic sources are derived from the incompressible ﬂow ﬁeld solution. An arbitrary Lagrangian-Eulerian (ALE) method is applied for coupling the ﬂuid and acoustic ﬁelds with the mechanical ﬁeld. The validity of this approach for acoustic simulations is shown using two classical acoustic test cases, which are extended to moving grids. Finally, the aerodynamic and acoustic eﬀects induced by an oscillating cylinder in a turbulent ﬂow are presented.
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