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Effect of transverse velocity and temperature gradients on sound attenuation in two-dimensional ducts

✍ Scribed by A.H. Nayfeh; J. Sun

Publisher: Elsevier Science
Year: 1974
Tongue: English
Weight: 472 KB
Volume: 34
Category: Article
ISSN: 0022-460X
DOI: 10.1016/s0022-460x(74)80179-3

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✦ Synopsis

An investigation is described of the effect of transverse mean-velocity and temperature gradients on sound attenuation in acoustically treated two-dimensional ducts. The results show that cooling the duct wails leads to channeling the sound toward the walls for both downstream and upstream propagation. The effect of mean-temperature gradients on the attenuation rates of the lowest three modes can be as important as the effect of meanvelocity gradients.

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