Noise suppression characteristics of peripherally segmented duct liners
Willie R. Watson, Langley Research Center, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1981 - Technology & Engineering - 43 pages
Try this search over all volumes: transonic
Results 1-0 of 0
What people are saying - Write a review
We haven't found any reviews in the usual places.
50 R Figure 9 modes 9 radial acoustic energy acoustic field acoustic intensity acoustic liners ADMITTANCE FOR PLANE-WAVE analysis Exact value attenuation axially segmented liners basis functions boundary conditions Characteristic functions complex expression computed from solving denotes Dimensionless frequency ducts with peripherally eigenfunction Pn(R,9 EIGENVALUES AT OPTIMUM eigenvalues computed equation 12 Exact solution Exact value 50 Galerkin method Helmholtz equation higher-order modes integer Langley Research Center Laplace operator least-attenuated mode lined section liner admittance Liners for Plane-Wave lining material matrix multitude of standing NASA noise suppression normalization constant number of peripheral number of strips Numerical solution computed odd standing waves optimal uniform OPTIMUM ADMITTANCE optimum uniform liner periph peripheral liner peripheral strips peripherally segmented liners PLANE-WAVE SOURCE plotted in figures QR algorithm Radial mode number real and imaginary series expansion solution to equation solving equation 21 table XIV uniform and peripherally uniform or axially value 50 Figure Value computed wave number