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RESEARCH PAPERS

Combustion Generated Noise in Gas Turbine Combustors

[+] Author and Article Information
W. C. Strahle, B. N. Shivashankara

School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Ga.

J. Eng. Power 98(2), 242-246 (Apr 01, 1976) (5 pages) doi:10.1115/1.3446152 History: Received December 02, 1974; Online July 14, 2010

Abstract

Experiments are conducted for the noise power and spectra emitted from a gas turbine combustor can exhausting to the atmosphere. The theory of combustion noise is applied to the results to determine the noise generating capability of the flame in the absence of reflecting can surfaces. The results show that for a fixed fuel (JP-4) the noise output is independent of fuel/air ratio for well stabilized can-type flames and heavily dependent on airflow while the spectra are dominated by the can acoustics, primarily through sound absorption by the liner. In an installed configuration the noise output depends heavily on the enclosure acoustics. For well stabilized can-type flames the equivalent unenclosed flame radiates with a thermoacoustic efficiency near 5 × 10−6 , for air-flows of the magnitude used in this program. Scaling rules are presented for installed configurations.

Copyright © 1976 by ASME
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