NASA NTRS · 19940024859
Boundary layer control device for duct silencers
Abstract
A boundary layer control device includes a porous cover plate, an acoustic absorber disposed under the porous cover plate, and a porous flow resistive membrane interposed between the porous cover plate and the acoustic absorber. The porous flow resistive membrane has a flow resistance low enough to permit sound to enter the acoustic absorber and high enough to damp unsteady flow oscillations.
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Schmitz, Fredric H., Soderman, Paul T.. 1993-11-15. Boundary layer control device for duct silencers. https://ntrs.nasa.gov/citations/19940024859
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