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.

到2050年，许多主要经济体已承诺将零温室气体排放量进行。要意识到这些目标需要立即采取行动。预计将通过包括可持续航空燃料（SAF），氢能和混合动力或所有电动飞机在内的不同技术组合来实现净净净。英国零零时的咨询预测，即使氢和电动飞机的SAF和突破性，系统效率的提高也需要提供36％的总体排放量。这些效率的提高可以通过推进和机身设计方面的进步来实现。紧凑型摄入量的设计被认为是下一代导管系统开发的重要技术。预计紧凑型进气口将在通过巡航阻力益处减少燃油燃烧以及总体推进系统的质量方面提供好处。在安全性关键的外部设计条件（例如高速攀升率）下的摄入性能是飞机认证过程的一部分。没有足够的空气动力学理解和设计方法，新型推进系统可能不可行。学生将测试以下假设：设计紧凑的推进系统摄入量并实现固有的好处，不稳定的失真的进气场以及风扇和进气口之间的不稳定互动，需要考虑。为了实现这一目标，需要从进气空气动力学设计，风扇可操作性和空气机械鲁棒性的角度评估不稳定的扭曲流场。