Turbocharger Aero-thermal Design Optimisation under Realistic Engine Conditions for Low Carbon Vehicles

充气系统广泛用于乘用车和商用车应用中，以增加功率密度并提高燃料经济性，从而显著减少排放。涡轮增压器发展到目前最先进的水平对于使汽车工业能够科普日益严格的排放法规至关重要，并且改进的范围仍然很大。虽然对涡轮增压器技术的投资使克服可靠性和成本问题成为可能，但在设计、测试方法和模型开发领域仍需进行研究。发动机制造商使用计算代码来预测发动机部件的性能和尺寸;在此过程中，预测精度至关重要。在最近的涡轮增压器研究中，主要感兴趣的物理现象包括与涡轮增压器空气动力学和热传递有关的物理现象。具体而言，将研究发动机上脉动废气流、涡轮增压器热传递和宽涡轮机映射的影响。本项目的目标包括：在真实（发动机上）环境中表征这些重要但未考虑（涡轮增压器初步设计过程）的涡轮增压器气动热流动现象的相互作用，并提供设计工具，以更好地提供信息，从而通过整合上述影响的设计方法加快涡轮增压器的初步设计周期。

Air charging systems are widely used in both passenger and commercial vehicle applications to increase power density and improve fuel economy leading to significant emissions reductions. The development of turbochargers to the current state-of-the-art has been of primary importance in enabling the automotive industry to cope with the ever stringent emissions regulations and the scope for improvement remains significant. Although investment in turbocharger technology has made it possible to overcome issues related to reliability and cost, research is much needed in the area of design, testing methodologies and model development. Computational codes are used by engine manufacturers to predict the performance and size of turbomachinery components; prediction accuracy is crucial in this process. The physical phenomena of primary interest in recent turbocharger research include those related to turbocharger aerodynamics and heat transfer. Specifically, the effects of on-engine pulsating exhaust gas flow, turbocharger heat transfer and wide turbine mapping will be investigated. The aims of this project include the characterisation of the interaction of these important but unaccounted for (by the preliminary turbocharger design process) turbocharger aero-thermal flow phenomena in a realistic (on-engine) environment and the delivery of design tools to better inform and therefore accelerate the preliminary design cycle of turbochargers by incorporating design methodologies that integrate the above effects.