Combined experimental and adjoint-based sensitivity analysis in thermoacoustics

Abstract eng:
Thermoacoustic oscillations are a persistent problem in gas turbine engines. Adjoint-based sensitivity analysis of a thermoacous- tic model shows, in a single calculation, how the growth rate of an eigenvalue is affected by every parameter of the model. These predictions are tested with automated experiments, which forces careful revision of the models. This paper contains results from one experiment and three models of increasing complexity, to show how this technique could be used in design optimization.

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