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2002 | OriginalPaper | Chapter

Phase Space Description of Unstable Dynamics of a Lean Premixed Gas Turbine Combustor

Authors : Alberto Fichera, Cinzia Losenno, Arturo Pagano

Published in: New and Renewable Technologies for Sustainable Development

Publisher: Springer US

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This work describes unstable phenomena of a lean premixed gas turbine combustor considering the geometrical properties in a phase space representation. Several experiments have been performed in which the air excess ratio λ and the percentage of pilot fuel PFP have been varied. The time series of experimentally measured pressure and heat release fluctuations inside the duct have been analysed using vectors collecting topological parameters of the attractors of experimental acoustical and optical sensors. Therefore, unsupervised Kohonen associative memories have been trained to create clusters of operating conditions characterised by similar dynamical behaviours. The results of the clustering underline the practical possibility of defining an algorithm for instability pattern recognition, which could be effective for either a diagnostic or a control system.

Metadata
Title
Phase Space Description of Unstable Dynamics of a Lean Premixed Gas Turbine Combustor
Authors
Alberto Fichera
Cinzia Losenno
Arturo Pagano
Copyright Year
2002
Publisher
Springer US
DOI
https://doi.org/10.1007/978-1-4615-0296-8_38