Tests described in report conducted to validate two-dimensional shear-flow analytical model for determination of acoustic impedance of acoustic liner in grazing-incidence, grazing-flow environment by use of infinite-waveguide method. Tests successful for both upstream and downstream propagations. Work has potential for utility in testing of engine ducts in commercial aircraft.
Tests Of Shear-Flow Model For Acoustic Impedance
NASA Tech Briefs ; 17 , 4
1992-04-01
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Englisch
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