Design and Evaluation of a Zero Mass Flow Liner

In this study, the concept of a zero mass flow liner is evaluated. The enables impedance control by induction of, acoustically actuated, periodic bias through facing sheet liner. By means flow, adapted to different grazing conditions. equivalent fluid model for perforated plates modified account effects and flow. A generally applicable optimization routine, using lined surface as boundary condition in numeric calculation, implemented. Based on results optimization, manufactured evaluated experimentally. damping characteristics are assessed form dissipated energy along surface. Prediction measurements show reasonable agreement. delivers broadband dissipation high peak value over range Mach numbers. Under effect reduced. For ratio velocities larger than five, no appreciable found. This poses considerable requirements actuation source application high-Mach-number regimes.