Sound transmission in slowly varying circular and annular lined ducts with flow
نویسندگان
چکیده
منابع مشابه
Sound propagation in slowly varying lined flow ducts of arbitrary cross section
Sound transmission through ducts of constant cross section with a uniform inviscid mean flow and a constant acoustic lining (impedance wall) is classically described by a modal expansion, where the modes are eigenfunctions of the corresponding Laplace eigenvalue problem along a duct cross section. A natural extension for ducts with cross section and wall impedance that are varying slowly (compa...
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Sound propagation in uniformly lined straight ducts with uniform mean flow is well established by its analytically exact description in duct modes [1, 2, 3]. In cross-wise nonuniform flow there are still modes, although the (Pridmore-Brown) equation that describes them is in general not solvable in terms of standard functions [4, 5, 6, 7, 8, 9] and has to be solved numerically. These modal solu...
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ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 1999
ISSN: 0022-1120,1469-7645
DOI: 10.1017/s0022112098003607