GOALI: Fast, Quantitatve Interrogation of Adavanced Internal Combustion Engine Technologies

Goali：DFB激光传感器用于快速、定量询问恶劣燃烧系统密歇根大学的M.S.Wooldridge和福特汽车公司的S.T.Wooldridge项目摘要先进的燃烧策略在显著提高燃烧效率的同时减少污染物排放具有相当大的潜力。实现这一潜力需要在审讯和传感方法方面同时取得进展，以便就燃烧室内的预测条件提供反馈，并为评估成功的技术提供衡量标准。本项目的重点是开发和应用一种基于激光的传感方法来询问燃烧系统，在这些系统中，高温、压力和快速瞬变对传统的实验方法构成了相当大的挑战。具体地说，这项工作将使用分布式反馈二极管激光器作为吸收光谱的发射源，以测量内燃机(IC)发动机中重要的物种。新的频率调制和波长复用将被用来提高时间分辨率和检测极限。这种诊断方法将被开发并应用于一家光学发动机设施，在那里，与福特汽车公司的合作将确保该方法迅速传播到工业研发设施。在这项工作的过程中，将利用共振和非共振吸收特征的特性来解决与发动机测量相关的困难。这项工作中提出的测量方法包括在整个发动机循环中连续获得具有良好时间分辨率的绝对定量气缸内物种浓度，而不是循环到循环的平均。收集这样的数据是内燃机研发中至关重要的下一步。拟议研究的直接成果包括固体激光和吸收光谱方面的重要进展，以及可应用于广泛系统的燃烧研究的新的有价值的工具。加深对先进内燃机燃烧系统中重要的物理和化学机制的了解，将大大有助于先进发动机技术的发展。因此，更广泛的影响包括设计和生产具有更好燃油经济性的内燃机发动机的潜力，同时减少污染物排放。该项目由GOALI学术联络机会计划和燃烧与等离子系统计划共同资助。

GOALI: DFB Laser Sensors for Fast, Quantitative Interrogation of Harsh Combustion SystemsM.S. Wooldridge, University of Michigan and S.T. Wooldridge, Ford Motor CompanyProject AbstractAdvanced combustion strategies have considerable potential to dramatically improve combustion efficiencies while simultaneously reducing pollutant emissions. Realization of this potential requires parallel advances in interrogation and sensing methods to provide feedback on the projected conditions within the combustion chamber and to provide metrics for assessing successful technologies. This project focuses on development and application of a laser-based sensing method for interrogation of combustion systems where the high temperatures, pressures and rapid transients present considerable challenges for conventional experimental approaches. Specifically, this work will use distributed feedback diode lasers as emission sources for absorption spectroscopy to measure species important in internal combustion (IC) engines. Novel frequency modulation and wavelength multiplexing will be used to improve temporal resolution and detection limits. The diagnostic will be developed and applied to a optical engine facility, where a partnership with Ford Motor Company will ensure rapid dissemination of the methods to industrial research and development facilities. Difficulties associated with engine measurements will be addressed in the course of this work using the characteristics of the resonant and off-resonant absorption features. Measurements proposed in this work include absolute quantitative in-cylinder species concentrations with good temporal resolution continuously acquired throughout an engine cycle, without cycle-to-cycle averaging. The collection of data such as these is a vital next step in IC engine research and development. Direct outcomes of the proposed research include important advancements in solid-state lasers and absorption spectroscopy along with a new valuable tool for combustion studies that can be applied to a broad range of systems. Increased understanding of the physical and chemical mechanisms important in advanced IC engine combustion systems will significantly aid in the development of advanced engine technologies. The broader impacts therefore include the potential to design and produce IC engines with better fuel economy while simultaneously decreasing pollutant emissions. This project is co-funded by the Grant Opportunities for Academic Liaison with Industry (GOALI) program and the Combustion and Plasma Systems program.