CUED Publications database

Forced response of flames in a swirling, bluff-body stabilized annular combustor

Allison, PM and de Oliveira, PM and Mastorakos, E (2017) Forced response of flames in a swirling, bluff-body stabilized annular combustor. In: UNSPECIFIED.

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In this study, the thermoacoustic response of annular combustors and single sectors to acoustic forcing is investigated. An 18-injector, gaseous-fuelled, annular combustor was forced in a configuration with azimuthally mounted speakers to drive both spinning and standing waves across a range of frequencies and amplitudes. The combustor was operated at two thermal loads, 104kW and 140kW. From simultaneously captured pressure and chemiluminescence measurements, the flame transfer function, defined as the relative response of the heat release to velocity field, was computed. In comparison to the complete annular configuration, a single sector burner was also considered to identify differences in flame-flow coupling between the geometries. This comparison provides information on the relevant need for full, annular scaled experiments. In addition, the transient lean blowout behaviour of the annular combustor was studied in which initial single sector and complete annular blowout limits are identified.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:26
Last Modified: 15 Apr 2021 05:12
DOI: 10.2514/6.2017-1337