EPSRC Industrial Case Award/Rolls Royce - Application of CMCs for static sealing components to be used in high temperature engine components

博士研究方向涉及复合材料热流体，特别是燃气涡轮发动机的先进密封技术。该项目属于EPSRC工程研究领域。该研究项目由牛津大学牛津热流体研究所的Peter Ireland教授监督。目前出现的稀燃喷气发动机导致气体温度和压力不断升高。由于燃气轮机是一个系统集成，这种提高性能的驱动产生了对能够抵抗极端温度的新材料的需求。高级复合材料是某些发动机部件的理想材料，因为它们能够在高温下保持机械性能。随着先进复合材料在喷气发动机上的应用，与先进密封相关的流动和热负荷还没有得到很好的理解。表征与这些新型高温密封相关的流动物理特性对于防止涡轮盘腔内的热气体摄入和减少内部气体泄漏至关重要，这两者都会对发动机的寿命和性能造成灾难性影响。该研究将重点关注新型高温材料在喷气发动机核心先进旋转密封中的科学和应用。该项目的目的是研究先进复合材料对与先进密封相关的流体流动和热负荷的影响。二十多种传统和复合材料先进的密封几何形状将进行实验研究。将为燃气轮机的应用选择最佳密封几何形状，并根据后处理结果创建新的密封几何形状。在研究中，计算、分析和实验研究将并行进行。将设计三个试验台来分析发动机代表性条件下密封件的性能、温度劣化和机械磨损。此外，模拟将使用有限元几何和计算流体力学来验证实验结果。分析模型也将进行研究，以提供一个彻底的洞察内部流动的简化和理想化的情况下的密封。参与这项研究的是劳斯莱斯航空航天公司。劳斯莱斯（Rolls-Royce）等工业合作伙伴的参与，为制造真正的发动机部件提供了机会。此外，研究结果将直接应用于当前和未来的燃气轮机。

The doctoral research involves thermofluids of composite materials, in particular advanced sealing technologies for gas turbine engines. The project falls within the EPSRC Engineering research area. The research project is supervised by Professor Peter Ireland at the Oxford Thermofluids Institute of the University of Oxford. The current advent of lean-burn jet engines has led to ever-increasing gas temperatures and pressures. As a gas turbine is a system integration, this drive for increased performance has created a demand for new materials able to resist extreme temperatures. Advanced composites are an ideal material for certain engine components due to their ability to retain mechanical properties at high temperatures. As the implementation of advanced composites in jet engines is recent, the flows and heat loads associated with advanced seals is not well understood. Characterizing the flow physics associated with these new high temperature seals is essential to prevent hot gas ingestion in the turbine disc cavities and reduce internal gas leakages, both of which cause disastrous effects on engine life and performance. The research will focus on the science and application of new, high temperature materials in advanced rotating seals within the jet engine core. The objective of the project is to examine the effects of advanced composites materials on the fluid flows and heat loads associated with advanced seals. Over twenty traditional and composite materials advanced sealing geometries will be examined experimentally. The best sealing geometries will be selected for applications in gas turbines, and new sealing geometries will be created based on post-processing results.In the research, computational, analytical and experimental studies will be undertaken in parallel. Three test rigs will be designed to analyze performance, temperature deterioration and mechanical wear of the seals in engine representative conditions. In addition, simulations will be performed using Finite Element Geometry and Computational Fluid Mechanics to validate experimental results. Analytical models will also be studied to give a thorough insight of the flow inside the seal for simplified and idealized cases. The industry involved in this research is Rolls-Royce Aerospace. The involvement of an industrial partner such as Rolls-Royce provides the opportunity to work on real engine components. In addition the findings of the research will be directly applied to a current and future gas turbines.