AddBluff4NH3/H2: Additively-manufactured bluff-body burner investigated by high-fidelity simulations and experiments for fuel-flexible, stable, and safe combustion ofNH3/H2 mixtures

本项目研究了一种附加制造的钝体燃烧器，用于NH3/H2混合气的燃料柔性、稳定和安全燃烧。对该燃烧器的燃烧和污染物排放特性进行了高保真数值模拟和详细的实验研究。在项目过程中，燃烧器的设计将进行优化(关于钝体形状、大小和位置)，以实现高效的燃烧行为。将考虑开放式和封闭式燃烧器的几何形状。火焰侧钝体和其他高温零件是通过添加制造而生产的，首先使用镍基合金，然后使用超高温耐火金属基合金，以实现快速的几何变化。研究了湍流火焰动力学、火焰-壁面相互作用、喷吹、火焰回火事件和热释放。最后，为NH_3/H_2混合燃料的稳定、安全、燃料弹性和清洁燃烧提供了优化的钝体燃烧器设计。

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.