SILOET 2: Project 3: Lightweight Fan System Design and Operation

现代高旁通比大型推力发动机，如劳斯莱斯Trent系列，其总体重量主要取决于风扇系统的重量。劳斯莱斯正在开发一种复合风扇系统，用于未来民用燃气轮机发动机的部署，主要目标是显著减轻重量。这使得比油耗(SFC)有了显著的改善，从而有助于减少排放和实现ACARE目标。提高推进效率需要通过风扇系统的设计来实现超高的发动机旁路，这意味着增加风扇直径和潜在重量。随着复合风扇系统的引入，总重量减少了300公斤，相当于减少了0.2%的SFC。这是劳斯莱斯、GKN航空航天公司和布里斯托尔大学的合作成果。该项目发展了未来的设计和建模能力，并为整个风扇系统开发了关键能力，确保其运行稳健和可靠。这包括开发一种坚固的衬垫系统，以保护外壳，并允许整体结构尽可能轻量化。该项目还开发了强大的叶片尖端摩擦能力；开发了防火复合外壳结构；以及开发了检查安全壳和衬里的无损检测(NDT)能力。该项目是下一代航空燃气轮机的推动者，并通过减轻发动机重量来提高产品竞争力，从而减少燃料消耗，从而降低环境排放。该项目显著提高了劳斯莱斯在复合材料技术领域的能力。在布里斯托尔建立了一个综合技术中心；这个先进的制造中心将处于开发下一代风扇叶片和风扇外壳的前沿。

The overall weight of a modern high bypass ratio large thrust engine, such as the Rolls-Royce Trent family is dominated by the weight of the fan system. Rolls-Royce is developing a composite fan system for deployment in future civil gas turbine engines, with the primary aim to deliver a significant weight saving. This enables substantial improvements in specific fuel consumption (sfc), thereby contributing to reduced emissions and achievement of the ACARE targets.Improving the propulsive efficiency requires ultra-high engine bypass through design of the fan system, which means increasing fan diameter and potentially weight. With the introduction of a composite fan system an overall weight saving of >300 kg is possible, which equates to a 0.2% sfc reduction.This was a collaboration between Rolls-Royce, GKN Aerospace and University of Bristol. This project developed future design and modelling capability and developed key capabilities for the overall fan system, ensuring its operation is robust and reliable. This included developing a robust liner system that protects the casing and allows the overall structure to be as lightweight as possible. The project also developed robust tip-rubbing capability for the blade tip; development of fire-proofing the composite casing structures; and development of Non Destructive Testing (NDT) capabilities to inspect the containment case and liner. This project is an enabler for the next generation of aero gas turbines and offers enhanced product competitiveness through reduced engine weight, leading to reduced fuel burn and hence lower environmental emissions. The project has significantly grown the capability of Rolls-Royce in the domain of composite technology. A Composite Technology Hub has been established in Bristol; the advanced manufacturing centre will be at the forefront of developing the next generation of fan blades and fan cases.