Development of a High Efficiency Axial Inflow Turbine for Application on a Downsized Gasoline Engine

项目目标：该研究旨在通过两种新概念（可变几何涡轮机和固定几何涡轮机）带来一种集成方法来实现创新，这两种概念都基于轴向涡轮机技术。所提出的两个概念旨在提供独特的汽油发动机可变几何形状和专用脉动流能量回收益处，与常规设计相比，在这两种情况下导致改进的涡轮机总静效率、更低的惯性、改进的“扭矩时间”以及改进的燃料消耗和排放。因此，该项目的具体目标是：了解利用两种新型轴向涡轮机概念的固有优势的基本限制，并确保在其设计过程中应用基础科学，以实现更高水平的汽油发动机排气能量回收和降低燃料消耗。评估这些概念在为现代汽油发动机提供VGT能力和上级脉动流性能方面的可行性，以及超越和跨越涡轮增压内燃机应用范围的可行性。与已建立的径流式和混流式涡轮机相比，两种拟议系统的燃料效率均达到或高于2%。通过实际的发动机试验，评估概念的可行性，并了解影响先进轴流式涡轮增压器涡轮机概念的实际问题。3.通过在独立测试设施4对两个概念涡轮增压器进行独立测试，评估方法的有效性和概念的可行性。在实验验证之前，优化两种先进轴向涡轮增压器涡轮机概念的设计。5.告知并进一步开发内部代码中应用的建模方法，以更好地预测轴流式涡轮增压器涡轮机性能。了解在实际（脉动、热）排气流条件下影响轴向涡轮机效率的问题，并了解影响所提议技术规模的问题

Project Aim:The research proposed aims to bring an integrated approach to deliver innovation through two novel concepts (a Variable Geometry Turbine and a Fixed Geometry Turbine), both based on axial turbine technology. The two concepts proposed aim to offer a unique gasoline engine variable geometry and dedicated pulsating flow energy recovery benefits, leading in both cases to improved turbine total-to-static efficiency, lower inertia, improved "time to torque", and improved fuel consumption and emissions, compared to conventional designs. As such the specific aims of the project are:To understand the fundamental limits of exploitation of the inherent advantages of the two novel, axial turbine concepts and ensure that the underlying science is applied in their design process to achieve higher levels of gasoline engine exhaust energy recovery and reduced fuel consumption compared to established technologies. To assess the viability of the concepts in providing VGT capability and superior pulsating flow performance for modern gasoline engines but also beyond and across the range of turbocharged ICE applications.Project objectives:1. To achieve levels of fuel efficiency equal to or higher than 2% for both of the proposed systems compared to established radial and mixed-flow turbines.2. To evaluate the viability of the concepts and understand the real-world issues that will affect advanced axial turbocharger turbine concepts, through realistic on-engine testing. 3. To evaluate the validity of methods and viability of the concepts through standalone testing of the two concept turbochargers at the standalone test facility 4. To optimise the design of the two proposed, advanced axial turbocharger turbine concepts prior to experimental validation. 5. To inform and further develop the modelling methodologies applied in the in-house code to better predict axial turbocharger turbine performance.6. To understand the issues affecting axial turbine efficiency under realistic (pulsating, hot) exhaust flow and to understand the issues affecting the scaling of the technologies proposed