Prediction of Silencer Performance Using Transmission Line Theory

[+] Author and Article Information
R. J. Wells

Research and Development Center, General Electric Co., Schenectady, N. Y.

R. B. Tatge

Gas Turbine Department, General Electric Co., Schenectady, N. Y.

J. Eng. Power 93(4), 404-410 (Oct 01, 1971) (7 pages) doi:10.1115/1.3445599 History: Received December 21, 1970; Online July 14, 2010


The size and cost of gas turbine exhaust silencers are largely set by low-frequency requirements. In that frequency range, the silencer cross-dimensions are small compared to the wavelength; it can therefore be considered to be one dimensional. Equations analogous to those governing electrical transmission lines can be written to predict the acoustical performance. Agreement between measured and predicted attenuation is good.

Copyright © 1971 by ASME
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