Acoustic receptivity due to weak surface inhomogeneities in adverse pressure gradient boundary layers
Meelan Choudhari, Lian Lai Ng, Craig Streett, United States. National Aeronautics and Space Administration
National Aeronautics and Space Administration, Langley Research Center, 1995 - 39 pages
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acoustic disturbance Acoustic Receptivity adverse pressure gradient airfoil amplitude asymptotic Blasius Boundary Layer boundary condition boundary layer flow Boundary Layer Receptivity corresponds coupling coefficient decreases displacement thickness distribution due to wall efficiency func efficiency function equa equation 3.6a Falkner-Skan boundary layers Figure finite Reynolds number Fluid Mech Fourier free-stream disturbance Goldstein Goldstein-Ruban theory Gradient Boundary Layers Hampton increase inflectional modes instability modes instability wave interaction inviscid laminar flow Langley Research Center linear magnitude maximum value mean flow perturbation Meelan NASA neutral stability curve no-slip condition nondimensional prediction pressure gradient parameter range receptivity caused Receptivity due receptivity mechanisms receptivity process receptivity theory reference length scale region Reynolds number approach short-scale Stokes shear wave stream function Streett sure gradient surface disturbances surface inhomogeneity surface nonuniformity tion Tollmien-Schlichting Waves triple-deck turbations type of instability viscous wall geometry variation wall geometry-induced receptivity wall suction velocity wave number wavelengths xlO3