Alkaline earth metal enabled scalar imaging for high-pressure combustion

该项目将开发一种新的研究工具，以改进燃烧室和发动机的设计过程。该方法利用产生烟花明亮颜色的相同原理，利用热金属原子及其燃烧产物的光发射来测量温度和其他燃烧参数。这种方法比现有的光学技术更简单，更便宜，将推动研究和开发应用。该项目将研究在一系列颜色下发光的亮度如何与燃料和空气混合物的温度和成分联系起来。然后，这种知识允许使用光发射的数字照片进行所需的测量，甚至具有三维分辨率。该项目还将为工程参与者创建一个平台，将研究工作与旨在增加多样性，公平性和包容性的几项努力相结合。例如，正在与教育学院合作开展一个项目，为在高中一级引入工程概念制定新的指导方针。此外，参与该研究的学生还可以从一个附属的转化研究项目中受益，该项目支持将大学的研究成果转化为商业上可行的解决方案。该项目将利用碱土金属，特别是锶的热激发燃烧产物的自发光发射，开发一种测量高温下温度和当量比的诊断工具，高压环境。该技术的应用将使三维成像诊断的进步，提高对燃烧的基本理解，并通过降低实验的复杂性和成本来支持先进燃烧技术的发展。控制光发射的物理过程取决于一系列因素，这些因素的影响将被研究，使火焰的光发射的定量分析。基础研究将在实验室燃烧器和光学可访问的研究引擎中进行。这一努力将导致一个模型，可以定量地描述在燃烧条件下的光发射。然后，将在现代直喷发动机中演示测量的实验应用。这些实验将利用管道镜以及多个高速相机或光场相机，这可以促进新的三维成像。

This project will develop a new research tool to enable improvements in the design process for combustors and engines. Exploiting the same principle that creates the bright colors of fireworks, this method uses light emission from hot metal atoms and their combustion products to measure the temperature and other combustion parameters. This method is simpler and cheaper than existing optical techniques and will advance both research and development applications. This project will study exactly how the brightness of the light emission at a range of colors is linked to the temperature and the composition of the fuel-and-air mixture. This knowledge then allows the use of digital photographs of the light emission for the desired measurements, even with three-dimensional resolution. This project will also create a platform for the engineering participants to integrate the research work with several efforts that aim to increase diversity, equity, and inclusion. For example, a project that develops new guidelines for introducing engineering concepts at the high school level is underway in collaboration with the School of Education. In addition, students involved with the research can benefit from an affiliated translational research program that supports the adaptation of university research results to commercially viable solutions.This project will use the spontaneous light emission from thermally-excited combustion products of an alkaline earth metal, specifically those of strontium, to develop a diagnostic tool for measuring temperature and equivalence ratio in high-temperature, high-pressure environments. Applications of this technique will enable advances in three-dimensional imaging diagnostics, enhance the fundamental understanding of combustion, and support the development of advanced combustion technologies by lowering the complexity and the cost of experiments. The physical processes that control the light emission depend on a range of factors and the influence of these factors will be studied to enable the quantitative analysis of the light emissions from the flames. The fundamental studies will be carried out in laboratory burners and optically accessible research engines. This effort will result in a model that can quantitatively describe the light emission under combustion conditions. Then, experimental applications for measurements will be demonstrated in modern direct-injection engines. These experiments will make use of borescopes as well as multiple high-speed cameras or light-field cameras, which can facilitate novel three-dimensional imaging.