Propulsion system intake design and unsteady aerodynamics

推进系统进气设计和非定常空气动力学

• 批准号: 2898256
• 金额: --
• 依托单位: CRANFIELD UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2898256
• 关键词: Propulsion; system; intake; design; unsteady

Many major economies have committed to net zero greenhouse gas emissions by 2050. To realise these targets immediate action is required. It is expected that net zero will be achieved through a mix of different technologies, including sustainable aviation fuels (SAF), hydrogen powered and hybrid or all electric aircraft. The UK Jet Zero consultation forecasts that even with an uptake of SAF and breakthroughs in hydrogen and electric aircraft, system efficiency improvements will need to provide 36% of the overall emissions abatement. These efficiency improvements can be achieved through advances in propulsion and airframe design.The design of compact intakes is considered a vital technology in the development of next generation ducted propulsion systems. Compact intakes are expected to provide benefits in terms of fuel burn reduction through cruise drag benefits as well as a reduction in the mass of the overall propulsion system. Intake performance at safety critical off-design conditions such as high incidence climb-out is part of the aircraft certification process. Without adequate aerodynamic understanding and design methods, novel propulsion systems may not be viable.The student will test the hypothesis that to design a compact propulsion system intake and to realise the inherent benefits, the unsteady distorted intake flow-field, as well as the unsteady interaction between fan and intake, need to be accounted. To achieve this, the unsteady distorted flow-field needs to be assessed from the point of view of the intake aerodynamic design, fan operability and aero-mechanical robustness.

许多主要经济体已承诺到2050年实现温室气体净零排放。要实现这些目标，必须立即采取行动。预计净零排放将通过不同技术的混合实现，包括可持续航空燃料（SAF）、氢动力和混合动力或全电动飞机。英国Jet Zero咨询公司预测，即使采用SAF，并在氢燃料和电动飞机方面取得突破，系统效率的提高仍需要提供总排放量的36%。这些效率的提高可以通过推进和机身设计的进步来实现。紧凑型进气道的设计被认为是下一代导管推进系统发展中的一项重要技术。紧凑的进气口有望通过巡航阻力减少燃油消耗，并减少整体推进系统的质量。在安全关键的非设计条件下的进气性能，如高发生率爬升，是飞机认证过程的一部分。没有足够的空气动力学知识和设计方法，新的推进系统可能是不可行的。学生将测试这样一个假设：为了设计紧凑的推进系统进气道并实现其固有的好处，需要考虑非定常畸变进气道流场以及风扇与进气道之间的非定常相互作用。为此，需要从进气气动设计、风扇可操作性和气动机械鲁棒性等方面对非定常畸变流场进行评估。