Presidential Young Investigator Award

拟议的研究重点是使用基于激光的诊断技术来研究内燃机中的喷雾动力学和混合。本研究将对激光衍射法测量颗粒大小、相态/多普勒颗粒风速法用于液相表征、红外光谱分析用于燃料蒸气测量等方面的最新进展进行综述。研究的目标包括制定制造公差和设计更改指南，以优化喷油策略以提高性能和改善排放控制，验证发动机燃烧模型所需的详细数据，以及详细喷雾特性与发动机排放的相关性。这项工作将涉及对喷油器喷雾排放形成机理的详细研究，其中许多人知之甚少，并将开始帮助设计排放控制的内燃机。

The proposed research focuses on the use of laser-based diagnostic techniques for studying spray dynamics and mixing in internal combustion engines. The state-of-the-art of laser diffraction particle sizing and phase/doppler particle anemometry for liquid phase characterization and infrared spectroscopy for fuel vapor measurements will be advanced in this study. The goals of the research include development of guidelines on manufacturing tolerances and design changes to optimize injection strategies for enhanced performance and improved emission control, detailed data required to verify engine combustion models, and the correlation of detailed spray characteristics to engine-out emissions. This work will involve detailed in-cylinder studies of emission formation mechanisms from fuel injector sprays, many of which are poorly understood, and will begin to help in designing combustion engines for emission control.