Simulations of a liner cell using a frequency-domain linearized Navier-Stokes methodology

• We present numerical simulations of a liner concept, where a thin layer of metallic foam material is located in between the perforated plate and the backing cavity. This liner concept was first presented in Ref 1, where experimental tests showed that the acoustic characteristics of such a liner are nearly independent of both flow and temperature. We use the linearized Navier-Stokes equations in frequency domain to simulate the acoustic waves and the coupling to the hydrodynamic field in the main duct and the liner neck. The effect of the metallic foam is modeled using the Delany-Bazley model. The numerical results are in good agreement with the experimental results presented in Ref 1. In addition, a parameter study on the influence of the flow resistivity of the metallic foam, mean flow speed and mean flow temperature is performed.

Nyckelord

Acoustic characteristic

Delany-Bazley models

Frequency domains

Hydrodynamic field

Linearized Navier-Stokes

Linearized navier-stokes equations

Numerical results

Parameter studies

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