HydrogEn combuSTion In Aero engines (HESTIA)

要减少航空对气候的影响，脱碳是一项重大挑战。目前的燃烧室正在燃烧碳氢燃料，如煤油或最近出现的SAF产品。今天，氢也被认为是一种很有前途的能源载体，但氢的燃烧带来了全新的挑战，需要理解和预见。赫斯提亚特别专注于增加未来氢燃料航空发动机氢-空气燃烧的科学知识。相关的物理现象将通过基础实验的执行进行评估。这项实验工作将与数值活动密切结合，这些活动将适应或开发模型，并逐步提高模型的成熟度，以便将它们整合到工业CFD代码中。HESTIA项目将在广泛的主题中解决不同的挑战：-提高对氢-空气湍流燃烧的科学认识：氢的优先扩散，湍流燃烧速度的修改，热声学，NOx排放，光学诊断的适应；-评估H2优化燃烧室的创新喷射系统：闪回风险，倾斜喷出，稳定性，NOx排放最小化，点火；-改进CFD工具和方法，用于在学术和工业配置中对H2燃烧进行数值模拟。为此，赫斯提亚召集了17所大学和研究中心以及6家欧洲航空发动机制造商，以连贯和有力的方式为未来环境友好型燃烧室的发展做好准备。

To reduce climate impact of aviation, decarbonisation is a major challenge. Current combustion chambers are burning hydrocarbon fuels, such as kerosene or more recently emerging SAF products. Hydrogen is also considered today as a promising energy carrier but the burning of hydrogen creates radically new challenges which need to be understood and anticipated. HESTIA specifically focuses on increasing the scientific knowledge of the hydrogen-air combustion of future hydrogen fuelled aero-engines. The related physical phenomena will be evaluated through the execution of fundamental experiments. This experimental work will be closely coupled to numerical activities which will adapt or develop models and progressively increase their maturity so that they can be integrated into industrial CFD codes. Different challenges are to be addressed in HESTIA project in a wide range of topics: - Improvement of the scientific understanding of hydrogen-air turbulent combustion: preferential diffusion of hydrogen, modification of turbulent burning velocity, thermoacoustics, NOx emissions, adaptation of optical diagnostics; - Assessment of innovative injection systems for H2 optimized combustion chamber: flashback risk, lean-blow out, stability, NOx emission minimisation, ignition; - Improvement of CFD tools and methodologies for numerical modelling of H2 combustion in both academic and industrial configurations. To this end, HESTIA gathers 17 universities and research centres as well as the 6 European aero-engine manufacturers to significantly prepare in a coherent and robust manner for the future development of environmentally friendly combustion chambers.