RACHEL (Robustly Achievable Combustion of Hydrogen Engine Layout

雷切尔项目在实践和合作伙伴关系方面都建立在以前技术开发的基础上，带来了大型OEM(SPIRIT Europe和ITP UK)、SME(Causeway And Reaction)、研究和学术(NCC和各种大学)以及英国供应商的子层，所有这些都带来了新颖性和敏捷的工作。其目标是开发一种高效、实用的氢气燃烧燃气轮机发电厂，能够在整个运行范围内使用液态氢燃料安全、实用和可靠地运行，并提供商业上可行的产品。英国政府的绿色工业革命10点计划和Jet Zero推动了可持续航空旅行的目标。同样，航空航天技术研究所呼吁英国航空业优先考虑可持续发展，并在环境问题上带头采取行动。向今天的煤油过渡到替代能源被认为是技术优先事项之一，氢气是未来10-15年内为飞机提供动力的燃料之一。特别是，氢燃料燃气轮机燃烧系统的开发已被确定为零碳排放飞行的关键推动因素，因为燃气轮机动力飞机目前占当今航空碳排放的96%。这绝非易事。尽管氢是一种非常清洁的燃料，可以产生几乎纯净的水作为废气产物，但不幸的是，与煤油相比，氢的能量密度非常低，这意味着燃料必须是低温液体的形式，才能使飞机飞行任何可察觉的距离。液氢的极低温度为-253摄氏度，对发动机部件来说是一个极其恶劣的环境，必须克服许多技术挑战，才能生产出与当今发动机具有相同严格要求的氢动力燃气轮机。氢的燃烧带来了许多挑战，无论是在氢燃料(低温和气体)的运输方面，还是在热管理和二次和三次油系统方面。由于该系统利用电力，电气系统的整合和与发电厂的整合是该项目的关键。此外，创新的储罐解决方案不仅将开发能够储存气体燃料的解决方案，还将解决净化介质储存的问题。这个令人兴奋的项目由项目合作伙伴和英国政府机构、BEIS、Innovate UK和ATI共同出资。

The RACHEL project builds on previous technology development in terms of both practices and the partnership, bringing a mix of large OEM's (Spirit Europe and ITP UK), SME's (Causeway and Reaction), research and Academia (NCC and various universities) plus subtiers of UK suppliers, all bringing novelty and agile working. The aim is to develop technologies and architectures that deliver an effective and practical hydrogen combustion gas turbine powerplant able to operate safely, practically and reliably with Liquid H2 fuel across the full operating range, and to deliver a commercially viable product. The UK government 10 Point Plan for a Green Industrial Revolution, and Jet Zero pushes forward the goal of sustainable air travel. Similarly, the Aerospace Technology Institute has called on the UK aviation industry to prioritise sustainability and lead action on environmental imperatives. Transition to alternative energy sources to today's kerosene is regarded as one of the technology priorities, and hydrogen is one fuel that could power aircraft in the coming 10-15 years. Particularly, development of a hydrogen-fuelled gas turbine combustion system has been identified as a key enabler for zero carbon emission flight, as gas turbine powered aircraft currently account for 96% of today's aviation carbon emissions.This is far from easy. Despite the advantage of being a very clean fuel, producing almost pure water as an exhaust product, hydrogen unfortunately has a very low energy density compared to kerosene, meaning that the fuel will have to be in the form of a cryogenic liquid to enable aircraft to fly any appreciable distance. The extremely low temperature of liquid hydrogen, -253 °C, is an incredibly harsh environment for the engine components, and many technological challenges will have to be overcome to produce a hydrogen-powered gas turbine that has the same exacting requirements of quality, performance, reliability and safety as today's engines.Combustion of hydrogen brings many challenges, both in terms of the transportation of the hydrogen fuel (cryogenic and gaseous) and also the heat management and secondary and tertiary oil systems. As the system leverages electrical power, the incorporation of electrical systems and the integration into the powerplant is key in this project. Additionally, innovative tank solutions will not only develop solutions capable of gaseous fuel storage but will also solve the issue of purging media storage.The exciting project is jointly funded through contribution from the project partners and UK government agencies, BEIS, Innovate UK and ATI.