Abstract
For the first time, the acoustic characteristics of a full-scale double-layer sample of acoustic liner were determined by numerical simulation of physical processes in an normal incident interferometer. The double-layer liner sample consisted of 14 honeycomb cells and 70 perforation holes. The dimensions of the honeycomb cells and perforation holes correspond to the acoustic liners used in the ducts of aircraft engines. Numerical simulation was carried out based on solution of the unsteady Navier-Stokes equations in three-dimensional formulation. A high degree of agreement of the acoustic characteristics obtained by numerical simulation with experiment was noted.
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