Acoustic eigenmodes of corrugated ductsAcoustic propagation in two-dimensional corrugated ducts is analyzed. A transform is made to a coordinate system that matches the duct walls. The resulting wave equation separates in space and time. The spatial differential equation is then solved by expanding in the eigenfunctions of a flat-walled duct. The prescription for this expansion is given by the appropriate application of time-independent perturbation theory. Calculations of first-order corrections for a periodic duct of both finite and infinite length are presented.
Document ID
19750058636
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Succi, G. P. (MIT Cambridge, Mass., United States)