Brush seal Resistance to Inlet Swirl and Transient Loading Effects (BRISTLE)

航空和其他旅行必须变得更加节能，以实现英国政府和国际社会制定的雄心勃勃的环境目标。发动机密封件是决定效率和燃油消耗的关键技术之一。在最高价值场所部署密封件以及开发由可靠密封件实现的高效新型系统架构方面仍然存在挑战。先进的轴封与顺应性灵活的元素可以提供几个优势，超过流行的国家的最先进的迷宫式密封。这些包括增加径向运动和轴接触的公差，以及减少泄漏，从而显著减少重量和空间包络。本研究旨在证明，它是可能的，以扩大工作范围，并提高一种密封类型，刷式密封的鲁棒性，使其可以更广泛地用于旋转机械。这种密封解决方案可用于提高当前产品的效率，也适用于未来的概念，包括那些具有替代工作流体和更电动的系统的概念。萨里大学刷式密封迭代模拟器（SUBSIS）能够捕获这些自适应密封内复杂的流体-结构相互作用，并应进行修改，以研究刷式密封对高水平入口涡流的抵抗力，与传统和压力平衡刷式密封配置在高轴速位置发现的情况一致。更新后的方法还将允许在瞬时轴侵入（与偏移（扫掠）或变形转子相关）下评估这些密封类型的刷毛-转子跟踪和密封泄漏特性。这些方法可以适用于模拟任何类型的密封与柔性元件在未来的研究。通过学术和工业合作，这项工作将为提供未来的密封、动力和推进技术迈出重要的一步。

Air and other travel must become more energy-efficient to meet ambitious environmental targets set by the UK government and internationally. One key technology, which is important in determining efficiency and fuel burn, is engine seals. Challenges remain in deploying seals in the highest value locations, and in developing highly efficient novel system architectures which are enabled by reliable seals. Advanced shaft seals with compliant flexible elements can offer several advantages over the prevalent state-of-the-art, the labyrinth seal. These include increased tolerance of radial movements and shaft contact, and reduced leakage for a significantly reduced weight and space envelope. This research seeks to demonstrate that it is possible to expand the operating range and improve the robustness of one seal type, the brush seal, such that this can be used more widely in rotating machinery. Such sealing solutions can be used to improve the efficiency of current products, and also apply to future concepts including those with alternative working fluids and systems which are more electric. The Surrey University Brush Seal Iterative Simulator (SUBSIS) is able to capture the complex fluid-structure interaction within these adaptable seals, and shall be modified to investigate the resistance of the brush seal to high levels of inlet swirl consistent with those found at high shaft speed locations, for conventional and pressure-balanced brush seal configurations. The updated method will also allow for an assessment of the bristle-rotor tracking and seal leakage properties of these seal types under transient shaft incursion, associated with an offset (sweeping) or distorted rotor. These methods can be adapted to simulate any seal type with flexible elements in future research. Via academic and industrial collaboration, this work will contribute a significant forward step in delivering the sealing and power and propulsion technologies of the future.