Liquid Hydrogen pumps for civil aviation

民用航空液氢泵

• 批准号: 2745765
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2745765
• 关键词: Liquid; Hydrogen; pumps; civil; aviation

Commercial aviation is responsible for 2.5% [1] of global greenhouse gas emissions and this percentage is set to rise as the demand for both passenger and cargo capacity increases. Liquid hydrogen is a promising alternative to carbon-based fuels because it has favourable combustion properties and no emissions at the point of use. The low density of hydrogen, however, mandates the use of cryogenic storage, which rises formidable technical challenges. The technologies to use cryogenically stored fuels do exist, but they are the preserve of space or strategic defence applications and therefore, cannot be easily deployed in commercial products. Furthermore, the service required of civil cryogenic fuel systems is very different from the service of space/defence applications and new technologies are needed.The purpose of this project is to understand the performance and hydrodynamic features of pumps for liquid hydrogen in civil aviation. The pumps are required to produce pressure rises in the order of 70bar while handling very small amounts of fuel. They are subject to cavitation and are sensitive to heat pick up because of the very large thermal expansion coefficient of liquid hydrogen.This project will address the following questions:What is the best machine type for the service typical of a large civil turbofan?What is the optimal flow arrangement?What is the best location for the pump in the fuel line?What is the performance of such a pump both at design point and off design?The project will deploy advanced numerical methods for nearly incompressible flow and will aim to build a fully validated capability for cryogenic pumps in civil aerospaceThis project falls within the EPSRC Fluid dynamics and aerodynamics research area. Rolls Royce is the industrial partner in this project.This is a EPSCR Industrial Case Studentship in collaboration with Rolls-Royce. References[1] T. Yusaf, L. Fernandes, A. Abu Talib, Y. Altarazi, W. Alrefae, K. Kadirgama, D. Ramasamy, A. Jayasuriya, G. Brown, R. Mamat, H. Dhahad, F. Benedict and M. Laimon, "Sustainable Aviation-Hydrogen Is the Future.," Sustainability, 2022.

商业航空占全球温室气体排放量的2.5% [1]，随着对客运和货运能力需求的增加，这一比例将上升。液氢是碳基燃料的一种有前途的替代品，因为它具有良好的燃烧性能，并且在使用时没有排放。然而，氢的低密度要求使用低温储存，这带来了巨大的技术挑战。使用低温储存燃料的技术确实存在，但它们是空间或战略防御应用的保留，因此不容易在商业产品中部署。此外，民用低温燃料系统所需的服务与空间/国防应用的服务大不相同，需要新技术，本项目的目的是了解民用航空液氢泵的性能和流体动力学特征。这些泵需要在处理非常少量的燃料时产生大约70 bar的压力上升。由于液氢的热膨胀系数很大，它们容易产生气穴现象，对热量的吸收很敏感。本项目将解决以下问题：对于大型民用涡轮风扇发动机，最佳的机型是什么？什么是最佳流程安排？泵在燃油管路中的最佳位置是什么？这种泵在设计点和非设计点的性能如何？该项目将部署先进的数值方法，几乎不可压缩的流动，并将旨在建立一个充分验证的能力，低温泵在民用航空。该项目属于EPSRC流体动力学和空气动力学研究领域的福尔斯。罗尔斯·罗伊斯公司是该项目的工业合作伙伴。这是一个与罗尔斯·罗伊斯公司合作的EPSCR工业案例研究项目。参考文献[1] T.尤萨夫湖费尔南德斯，A.阿布·阿布卜、Y.阿尔塔拉济湾Alrefae，K. Kadirgama，D. Ramasamy，A. Jayasuriya，G.布朗河Mamat，H. Dhahad，F. Benedict和M. Laimon，“可持续航空-氢是未来。“可持续发展，2022年。