Record #950804 - RWTH Publications

HYDROGENATE

Hydrogen-Based Intrinsic-Flame-Instability-Controlled Clean and Efficient Combustion

Grant period	2022-06-01 - 2027-05-31
Funding body	European Union
Call number	ERC-2021-ADG
Grant number	101054894
Identifier	G:(EU-Grant)101054894

Note: Chemical energy carriers will play an essential role for future energy systems, where harvesting and utilization of renewable energy occur not necessarily at the same time or place, hence long-time storage and long-range transport of energy are needed. For this, hydrogen-based energy carriers, such as hydrogen and ammonia, hold great promise. Their utilization by combustion-based energy conversion has many advantages, e.g., versatile use for heat and power, robust and flexible technologies, and its suitability for a continuous energy transition. However, combustion of both hydrogen and ammonia is very challenging. For technically relevant conditions, both form intrinsic, so-called thermo-diffusive instabilities (very different from the often-discussed thermo-acoustic instabilities), which can increase burn rates by a stunning factor of three to five! Without considering this, computational design is impossible. Yet, while linear theories exist, little is understood for the more relevant non-linear regime, and beyond some data and observations, virtually nothing is known about the interactions of intrinsic flame instabilities (IFI) with turbulence. Here, rigorous analysis of new data for neat H2 and NH3/H2-blends from simulations and experiments will lead to a quantitative understanding of the relevant aspects. From this, a novel modeling framework with uncertainty estimates will be developed. The key hypothesis then is that combustion processes of hydrogen-based fuels can be improved by targeted weakening or promotion of IFI, and that this kind of instability-controlled combustion can jointly improve efficiency, emissions, stability, and fuel flexibility in different combustion devices, such as spark-ignition engines, gas turbines, and industrial burners. Guided by the developed knowledge and tools, this intrinsic-flame-instability-controlled combustion concept will be demonstrated computationally and experimentally for two sample applications.

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Journal Article/Contribution to a conference proceedings Golc, D. (Corresponding author)RWTH* ; Esposito, S. ; Khosravi, M. ; Beeckmann, J.RWTH* ; Pitsch, H.RWTH*
Investigation of hot-spot-induced pre-ignition in methanol- and hydrogen-fueled spark-ignition engines
202512. European Combustion Meeting, ECM 2025, Edinburgh, ScotlandEdinburgh, Scotland, UK, 8 Apr 2025 - 11 Apr 20252025-04-082025-04-11 Proceedings of the Combustion Institute 41, 105932 (2025) [10.1016/j.proci.2025.105932] special issue: "12th European Combustion Meeting (ECM), Edinburgh, Scotland, UK, April 8-11, 2025 / Guest Editors: Deanna Lacoste; Brian Peterson; Laurent Selle"2025 OpenAccess Files BibTeX | EndNote: XML, Text | RIS

Dataset Howarth, T. L.RWTH* ; Nerzak, S. M.RWTH* ; Gruhlke, P. ; Lipkowicz, J. T. ; Panek, L. ; Pfadler, S. ; Gauding, M.RWTH* ; Pitsch, H.RWTH*
Data for 'Structure and nitrogen oxide emissions of confined turbulent hydrogen jet flames'
[10.18154/RWTH-2025-07748] OpenAccess Files BibTeX | EndNote: XML, Text | RIS

Contribution to a book/Contribution to a conference proceedings Orland, F. (Corresponding author)RWTH* ; Nista, L. (Corresponding author)RWTH* ; Kocher, N. (Corresponding author)RWTH* ; Vanvinckenroye, J. (Corresponding author)RWTH* ; Pitsch, H. (Corresponding author)RWTH* ; Terboven, C. (Corresponding author)RWTH*
Efficient and Scalable AIxeleration of Reactive CFD Solvers Coupled with Deep Learning Inference on Heterogeneous Architectures
2025The Proceedings of International Conference on High Performance Computing in Asia-Pacific Region Workshops (HPC Asia 2025 Workshops) : February 19, 2025 Sheraton Hsinchu Hotel, Hsinchu, Taiwan
2025 International Conference on High Performance Computing in Asia-Pacific Region, HPCASIA 2025, HsinchuHsinchu, Taiwan, 19 Feb 2025 - 21 Feb 20252025-02-192025-02-21 New York, NY, USA : ACM 45-57 (2025) [10.1145/3703001.3724386]2025 OpenAccess Files BibTeX | EndNote: XML, Text | RIS