Novel Fuel-Flexible ultra-Low Emissions Combustion systems for Sustainable aviation

正如最近的发动机开发计划所证实的那样，通过改用可持续燃料（SAF）和氢气（H2），可以在改善机场当地空气质量的同时实现航空脱碳。然而，这两种燃料都需要在燃气涡轮机燃烧室中进行重大开发，因为现有技术不仅可以进一步减少长期标准和目标所期望的NOx和PM排放，而且通常不适合100%直接燃烧氢气。在这个项目中，将研究革命性的燃烧室结构，在科学范围和TRL方面扩展以前清洁天空2号“创新NOx减排技术”项目的初步成果。特别是，该项目将推进（i）贫方位火焰（LEAFinnox），一种基于无焰氧化的新型燃烧系统，（ii）紧凑螺旋排列的燃烧室（cylindrical lift），一种使用相互作用的贫提升火焰的新系统，以及（iii）喷雾和火焰稳定机制的等离子体和电动操纵。这些新概念所提供的燃料灵活性是允许SAF和H2操作的关键。这一独特的功能将被利用，以提供新的双燃料LTO循环策略和超低NOx，超低碳烟的单一或双燃料使用。将在现有的专用钻机和数值计算工作上进行实验，以提供基础和实践层面的知识，从而在项目结束时实现TRL 3和更高的发展。该项目将包括新的CFD，低阶和AI模型，以及成熟的商业开发的新型稳定技术。

Improving Local Air Quality at airports while at the same time decarbonising aviation can be achieved by switching to sustainableaviation fuels (SAFs) and hydrogen (H2), as confirmed by recent engine development programs. However, both these fuels requiresignificant developments in the gas-turbine combustor because present technologies not only to further reduce NOx and PM emissionsas expected by long-term standards and objectives but also are not normally suitable for 100% direct combustion of hydrogen. In thisproject, revolutionary combustor architectures will be studied, extending the preliminary results of previous Clean Sky 2 "Innovative NOxReduction Technologies" projects in terms of scientific scope and TRL. In particular, this project will advance (i) the Lean AzimuthalFlame (LEAFinnox), a novel combustion system based on Flameless Oxidation, (ii) the Compact Helically Arranged combustoR(CHAIRlift), a new system which uses interacting lean lifted flames, and (iii) plasma and electric manipulation of the spray and of theflame stabilisation mechanism. The fuel flexibility offered by these novel concepts is key to allow for SAF and H2 operations. Thisunique feature will be exploited to give novel dual-fuel LTO cycle strategies and ultra-low NOx, ultra-low soot single or dual-fuel use.Experiments on available dedicated rigs and numerical work will be performed to provide knowledge at the fundamental and practicallevel that will allow TRL3 and higher developments at the end of the project. The project will include new CFD, low-order, and AImodels, and novel stabilisation techniques ripe for commercial exploitation.