Detection Of Lean Blowout In A Premixed
Gas-turbine Model Combustor Based On
Nonlinear Dynamics
Author(s)
Y. Shinoda1, M. Kobayashi1, H. Gotoda1 & S. Tachibana2
Abstract
A detection method of lean blowout in a laboratory-scale premixed gas-turbine
model combustor has been proposed from a view point of nonlinear dynamics.
The translation error, which quantifies the degree of the parallelism of
trajectories in the phase space constructed from the time-series data of the
combustion-chamber pressure fluctuations, is used as a detector in this work.
The dynamic behavior in the complex combustion instability close to lean
blowout is successfully characterized by the translation error. The obtained
results show that the translation error has a potential use for detecting the lean
blowout in a lean premixed gas-turbine combustor.
Keywords: lean premixed gas-turbine combustor, lean blowout, detection,
nonlinear dynamics.
1 Introduction
Lean premixed combustion is highly advantageous for reducing nitrogen oxide
(NOx) emission from gas-turbine engines without the loss of combustion
efficiency by controlling the equivalence ratio to within an appropriate range.
This combustion method has attracted considerable attention from developers of
gas-turbine combustors. A major drawback of lean premixed combustors,
however, is that they are susceptible to flow perturbations. They suffer from
combustion instabilities such as thermoacoustic combustion oscillations, lean
Keywords
lean premixed gas-turbine combustor, lean blowout, detection,
nonlinear dynamics.
Related Book
Other papers in this volume
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