Virginia Tech. Engineering Science and Mechanics DepartmentNayfeh, Ali H.2015-05-282015-05-281975Nayfeh, A. H. (1975). Acoustic waves in ducts with sinusoidally perturbed walls and mean flow. Journal of the Acoustical Society of America, 57(5), 1036-1039. doi: 10.1121/1.3805700001-4966http://hdl.handle.net/10919/52725An analysis is presented of the propagation of acoustic waves in a hard-walled duct with sinusoidally perturbed walls and carrying mean flow. The results show that resonance occurs whenever the wavenumber of the wall undulations is approximately equal to the difference between the wavenumber of any two propagating modes. It is shown that neither of the resonating modes could exist in the duct without strongly exciting the other resonating mode.4 pagesapplication/pdfen-USIn CopyrightAcoustic resonanceAcoustic wavesDuct flowsAcoustic analysisAcoustic waves in ducts with sinusoidally perturbed walls and mean flowArticle - Refereedhttp://scitation.aip.org/content/asa/journal/jasa/57/5/10.1121/1.380570Journal of the Acoustical Society of Americahttps://doi.org/10.1121/1.380570