Bulletin of the American Physical Society
75th Annual Meeting of the Division of Fluid Dynamics
Volume 67, Number 19
Sunday–Tuesday, November 20–22, 2022; Indiana Convention Center, Indianapolis, Indiana.
Session Z11: Acoustics: Thermo II
12:50 PM–2:34 PM,
Tuesday, November 22, 2022
Room: 138
Chair: Daniel Rodriguez, Universidad Politecnica de Madrid
Abstract: Z11.00003 : Azimuthally forced combustion instabilities in an annular combustor across different operating conditions and fuels*
1:16 PM–1:29 PM
Presenter:
Abhijat Verma
(Norwegian Univ Tech (NTNU))
Authors:
Abhijat Verma
(Norwegian Univ Tech (NTNU))
Håkon T Nygård
(Norwegian Univ Tech (NTNU))
Nicholas A Worth
(Norwegian Univ Tech (NTNU))
In the present study, AFDFs are measured in the same combustor using the same acoustic forcing procedure as Nygård et al. (2021), but for ethylene at various equivalence ratios and for various bulk velocities. The same is also done for hydrogen-methane mixtures, with the addition of varying the hydrogen power fraction. This parameter study is done to test and improve the current understanding of AFDFs and methods for their measurement. Such a parameter study, by showing which instability modes are preferred under which conditions, offers a better understanding of the operational stability of gas turbines.
*This work has been funded by The Research Council of Norway.
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