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.

References

References
1.
Mile
,
J. H.
,
2009
, “
Time Delay Analysis of Turbofan Engine Direct and Indirect Combustion Noise Sources
,”
J. Propul. Power
,
25
(
1
), pp.
218
227
.
2.
Ducruix
,
S.
,
Schuller
,
T.
,
Candel
,
S.
, and
Durox
,
D.
,
2003
, “
Combustion Dynamics and Instabilities: Elementary Coupling and Driving Mechanisms
,”
J. Propul. Power
,
19
(
5
), pp.
722
734
.
3.
Karmalita
,
V. A.
, and
Furletov
,
V. I.
,
1987
, “
Autoregression Method for Determining the Decrement and Frequency of the Natural Oscillations of a Gas in a Combustion Chamber
,”
Combust. Explos. Shock Waves
,
23
(
6
), pp.
694
700
.
4.
Box
,
G. E. P.
,
Jenkins
,
G. M.
, and
Reinsel
,
G. C.
,
2008
,
Time Series Analysis: Forecasting and Control
, 4th ed.,
Wiley
,
Hoboken, NJ
.
You do not currently have access to this content.