Numerical Simulation and Advanced Modelling of Hydrogen-Fuelled Propulsion Systems for Reusable Launch Vehicles

可重复使用运载火箭氢燃料推进系统的数值模拟和高级建模

基本信息

批准号：
2282954
负责人：
金额：
--
依托单位：
Newcastle University
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2019
资助国家：
英国
起止时间：
2019 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2282954
关键词：
Numerical Simulation Advanced Modelling Hydrogen

项目摘要

1 OverviewReaction Engines Ltd (REL) is a UK-based company formed in 1989 to design and develop technologies for a new class of hypersonic propulsion system - the Synergetic Air-Breathing Rocket Engine (SABRE). REL's breakthrough technology is an ultra-lightweight heat exchanger that enables the SABRE engine to use conventional aerotechnology at unconventionally high speeds by preventing engine components overheating. SABRE technology will enable aircraft to fly over five times the speed of sound in the atmosphere, and realise single-stage-to-orbit space launch vehicles, reducing costs and improving access to space.Key to the success of the SABRE engine is using hydrogen as fuel, burning under unconventional conditions that are far from well-understood. Combustion at these conditions includes inherent instabilities (thermodiffusive, hydrodynamic and thermoacoustic) that pose signicant challenges to combustor design. Prototyping such world-leading technology is extremely expensive, and numerical simulation can provide unparalleled insight into the fundamental physical processes involved in such novel combustors, thereby aiding the design and development process. However, existing numerical simulations have demonstrated a sensitivity to models used to describe turbulent mixing and flame physics; there is a need for high-resolution numerical simulations to develop and validate reliable turbulent combustion models that can be used for combustor design and development.2 MethodologyA database of high-fidelity three-dimensional Direct Numerical Simulations (DNS) will be constructed that consider both the turbulent mixing of direct injection of hydrogen fuel into a sub-sonic cross-flow, and the subsequent downstream lean combustion at conditions relevant for SABRE. NASA's low-emission lean-hydrogen burner will be used as a target test cases, and Reaction Engines will provide further necessary conditions that can be used for initialisation.The DNS calculations will be carried out using PeleLM (and PeleC, if necessary), developed at the Lawrence Berkeley National Laboratory in California, and built on a framework with which the PI has over fteen years' experience. Key advantages include exploitation of the low Mach number approximation and adaptive mesh renement, both of which signicantly reduce computational expense, and is optimised for use on massively-parallel supercomputers, making it a world-leading computational tool for turbulent combustion. Simulations increasing in size will be carried out in stages, starting from a high-specication workstation, through the NU HPC facility "Rocket", up to the national supercomputer "Archer".The DNS data will be analysed in detail to assess existing turbulent flame models used for Reynolds Averaged Navier Stokes (RANS) and Large Eddy Simulation (LES) approaches, and to guide development of new models as appropriate. The models will be implemented and tested in an engineering CFD software framework, and validated on the same cases as conducted for the DNS simulations; this will allow direct comparisons to be made and to iterate on the model development, thereby establishing the condence in the approach so that it can be applied more generally to aid the design and development of SABRE combustor technology.Suggested research areas: Continuum Mechanics, Combustion Engineering, Fluid Dynamics and aerodynamics, Numerical Analysis, Hydrogen and alternative energy vectors

1 Overviewreaction引擎有限公司（REL）是一家位于1989年的英国公司，旨在为新型的高超音速推进系统设计和开发技术 - 协同气动火箭发动机（SABER）。 REL的突破性技术是一种超轻质热交换器，它使Saber发动机通过防止发动机组件过热，在不常规的高速下使用常规的空气技术。 Saber Technology将使飞机能够飞行大气速度的五倍超过五倍，并实现单阶段到轨的太空发射车，降低成本并提高了空间的访问权限。对Saber Engine的成功，将使用氢用作燃料，在非常规条件下燃烧，这些条件远远不够。在这些条件下的燃烧包括固有的不稳定性（热能，流体动力和热声），对燃烧器设计构成了显着挑战。原型制作这种世界领先的技术非常昂贵，数值模拟可以为这种新型燃烧器涉及的基本物理过程提供无与伦比的见解，从而有助于设计和开发过程。但是，现有的数值模拟表明对用于描述湍流混合和火焰物理的模型的敏感性。需要高分辨率的数值模拟来开发和验证可用于燃烧器设计和开发的可靠湍流燃烧模型。2ModedogyA高保真性三维直接数值模拟（DNS）的数据库将构建，这些数据将构建，这些数据库将构建，这些数据库既可以考虑将氢燃料供应液的湍流混合，又是诸如亚燃料的湍流混合，并构建军刀。 NASA的低排放稀释剂燃烧器将用作目标测试案例，反应引擎将提供可用于初始化的进一步条件。DNS计算将使用PELELM（如有必要）在Lawrence Berkeley National Laboratory的加利福尼亚州的Lawrence National Laboratory开发，并在加利福尼亚州的Lawrence National Laboratory上开发，并在PI上构建了freforper the Pi'经验。关键优势包括对低马赫数近似值和自适应网状恢复的开发，这两者都显着降低了计算费用，并且可以优化用于大规模平行的超级计算机，使其成为世界领先的计算工具，用于湍流燃烧。 Simulations increasing in size will be carried out in stages, starting from a high-specication workstation, through the NU HPC facility "Rocket", up to the national supercomputer "Archer".The DNS data will be analysed in detail to assess existing turbulent flame models used for Reynolds Averaged Navier Stokes (RANS) and Large Eddy Simulation (LES) approaches, and to guide development of new models as appropriate.这些模型将在工程CFD软件框架中实施和测试，并在与DNS模拟相同的情况下进行验证；这将允许进行直接比较，并在模型开发上进行迭代，从而在方法中建立凝结，以便更普遍地将其应用于Saber Combustor技术的设计和开发。烟囱的研究领域：连续性力学，燃烧工程，流体动力学和空气动力学，数值分析，氢气和替代性能量，氢气，氢气分析，氢气，氢气，氢气，氢气，氢气，氢气，氢化和发展。