AddBluff4NH3/H2: Additively-manufactured bluff-body burner investigated by high-fidelity simulations and experiments for fuel-flexible, stable, and safe combustion of NH3/H2 mixtures

• Applicants: Professor Dr.-Ing. Frank Beyrau; Professorin Dr.-Ing. Manja Krüger; Professor Dr. Dominique Thévenin
• Subject Area: Energy Process Engineering ; Materials in Sintering Processes and Generative Manufacturing Processes ; Mechanical Properties of Metallic Materials and their Microstructural Origins ; Fluid Mechanics
• Term: since 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 523880888

This project investigates an additively-manufactured bluff-body burner for fuel-flexible, stable and safe combustion of NH3/H2 mixtures. High-fidelity numerical simulations and detailed experimental investigations are carried out to study combustion and pollutant emission characteristics in this burner. In the course of the project, the burner design will be optimized (with respect to bluff-body shape, size and position) to achieve an efficient combustion behavior. Open and confined burner geometries will be considered. Flame-side bluff-body and other high-temperature parts are produced by additive manufacturing using first Ni-based alloys and later ultra-high temperature resistant refractory metal-based alloys to enable rapid geometry variations. Turbulent flame dynamics, flame-wall interactions, blow-off, flame flash-back events, and heat release are investigated. Finally, an optimal bluff-body burner design will be obtained for stable, safe, fuel-flexible, and clean combustion of NH3/H2 as blend fuel.

• DFG Programme: Priority Programmes
• Subproject of: SPP 2419: A contribution to the realization of the energy transition: Optimization of thermochemical energy conversion processes for the flexible utilization of hydrogen-based renewable fuels using additive manufacturing