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 U25: Reacting Flows: Instabilities
8:00 AM–10:36 AM,
Tuesday, November 22, 2022
Room: 233
Chair: Sina Kheirkhah, The University of British Columbia
Abstract: U25.00009 : Influence of equivalence ratio on combustion instability of a low-swirl flame under lean-hydrogen conditions.*
9:44 AM–9:57 AM
Presenter:
Jun Nagao
(Kyoto University)
Authors:
Jun Nagao
(Kyoto University)
Abhishek L Pillai
(Kyoto University)
Takeshi Shoji
(JAXA)
Shigeru Tachibana
(JAXA)
Takeshi Yokomori
(Keio University)
Ryoichi Kurose
(Kyoto Univ)
The obtained results in this numerical study reveal that the strongest combustion instability is observed at an equivalent ratio of 0.39, confirming that the correlation between pressure and heat release rate becomes strongest at this equivalent ratio. Although the difference in the equivalence ratio with maximum intensity exists, the trend of having maximum intensity not at the highest equivalence ratio but at a specific equivalence ratio is reproduced. This difference is attributed to the limited accuracy of the models employed in this study.
*This work was partially supported by JSPS KAKENHI (Grant Numbers 19H02076 and 22H00192). This work used the computational resources of the supercomputer Fugaku provided by the RIKEN Center for Computational Science (hp200160, hp210020).
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