TY  - CHAP
A1  - Kroniger, Daniel
A1  - Horikawa, Atsushi
A1  - Funke, Harald
A1  - Pfäffle, Franziska
T1  - Numerical investigation of micromix hydrogen flames at different combustor pressure levels
T2  - Proceedings of the International Conference on Power Engineering 2021
N2  - This study investigates the influence of pressure on the temperature distribution of the micromix (MMX) hydrogen flame and the NOx emissions. A steady computational fluid dynamic (CFD) analysis is performed by simulating a reactive flow with a detailed chemical reaction model. The numerical analysis is validated based on experimental investigations. A quantitative correlation is parametrized based on the numerical results. We find, that the flame initiation point shifts with increasing pressure from anchoring behind a downstream located bluff body towards anchoring upstream at the hydrogen jet. The numerical NOx emissions trend regarding to a variation of pressure is in good agreement with the experimental results. The pressure has an impact on both, the residence time within the maximum temperature region and on the peak temperature itself. In conclusion, the numerical model proved to be adequate for future prototype design exploration studies targeting on improving the operating range.
KW  - Gas turbine combustion
KW  - Hydrogen
KW  - NOx emissions
KW  - Flame temperature
KW  - Flame residence time
Y1  - 2021
N1  - Proceedings of the International Conference on Power Engineering 2021
(ICOPE-2021). October 17 - 21, 2021. Kobe, Japan (Online)
ER  -