CUED Publications database

Large eddy simulation of a dual swirl gas turbine model combustor with self-excited thermo-acoustic instability

Chen, ZX and Swaminathan, N (2017) Large eddy simulation of a dual swirl gas turbine model combustor with self-excited thermo-acoustic instability. In: 11th Asia-Pacific Conference on Combustion, 2017-12-10 to 2017-12-14.

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Abstract

© 2018 Combustion Institute. All Rights Reserved. Large eddy simulation is performed for stable and unstable swirl flames established in a partially premixed gas turbine model combustor. A flamelet closure is used for the sub-grid combustion process including both premixed and non-premixed mode contributions. Cold flow study is conducted to investigate mesh sensitivity on the flow field in the combustion chamber. Two reacting cases, one stable flame and another unstable, are computed to assess the model abilities of predicting flame structure and thermo-acoustic instability. The computed results of velocity, temperature and OH concentration agree well with the experimental data. The self-excited instability is also predicted in the simulation of the unstable flame, however, the oscillating frequency is significantly under-predicted.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 28 May 2018 20:04
Last Modified: 08 Apr 2021 05:57
DOI: