This paper deals with the autoregression method to determine the logarithmic decrement and natural frequency of gas oscillations in a combustion chamber. The proposed approach to quantify the impact of combustion noise on the estimates of oscillation decrement is based on a linear model of the vibrating combustion phenomena. An application of the proposed approach for afterburner tests is presented as well.

Issue Section:
Technical Brief
Keywords:
Combustion, Elasticity, Experimental techniques, Reactive flows
Topics:
Combustion, Noise (Sound), Oscillations, Turbulence

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