UNS: Simultaneous 4D Flamelet and Velocity Diagnostics for Resolving Flamelet/Flow Interactions

UNS：同时 4D 小火焰和速度诊断，用于解决小火焰/流动相互作用

• 批准号: 1803470
• 负责人: Lin Ma
• 金额: $ 16.35万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-10-01 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1803470&HistoricalAwards=false
• 关键词: UNS; Simultaneous; 4D; Flamelet; Velocity

CBET - 1505112PI: Ma, LinTurbulent combustion is a fundamental process of significant scientific and practical importance. Turbulent flames are inherently three-dimensional in space and dynamic in time. Until now, experimental techniques to measure turbulent flames have been limited to measurements at a point, along a line, or across a plane, and they do not fully resolve the three-dimensional structure of the flame. This project will conduct four-dimensional measurements that resolve the flame in all three spatial directions and time with precise resolution, which will improve our understanding of turbulent combustion. Turbulent combustion is the key process in many devices that dominate energy production. Improving our understanding of turbulent combustion will lead to the design of more efficient and cleaner energy devices. The project will also employ internet resources to develop learning platforms for a larger audience, to disseminate results to a wider community, and to increase public awareness of energy, environmental, and information technology issues. This goal of this project is to obtain instantaneous and simultaneous 4D measurements of multiple properties key to the turbulent combustion processes. The project will apply 3D tomographic diagnostics recently developed by the PI to resolve flamelet/flow interactions in turbulent flames. The target properties include 3D flame surface density, flame volume, flame curvature, fractal dimension, 3D3C (three-dimensional, three-component) velocity fields, and also potentially local strain rate and turbulent flame speed. The success of this project will enable measurements of such properties in 4D for representative turbulent flames, and to establish multidimensional datasets that can be used for the development of computational tools for designing new energy devices. Furthermore, the project combines several distinct disciplines, including optical imaging, computed tomography, combustion, and the processing and analysis of large datasets. Results from the project will benefit practitioners in energy, photonics, and information technology.

CBET - 1505112PI：Ma，Lin 湍流燃烧是一个具有重大科学和实际意义的基本过程。 湍流火焰本质上在空间上是三维的，在时间上是动态的。到目前为止，测量湍流火焰的实验技术仅限于点、沿线或跨平面的测量，并且不能完全解析火焰的三维结构。 该项目将进行四维测量，以精确的分辨率解析所有三个空间方向和时间上的火焰，这将增进我们对湍流燃烧的理解。 湍流燃烧是许多主导能源生产的设备的关键过程。 提高我们对湍流燃烧的理解将有助于设计出更高效、更清洁的能源设备。 该项目还将利用互联网资源为更多受众开发学习平台，向更广泛的社区传播成果，并提高公众对能源、环境和信息技术问题的认识。该项目的目标是获得对湍流燃烧过程至关重要的多个属性的瞬时、同步 4D 测量。 该项目将应用 PI 最近开发的 3D 断层扫描诊断技术来解决湍流火焰中的火焰/流动相互作用。目标属性包括 3D 火焰表面密度、火焰体积、火焰曲率、分形维数、3D3C（三维、三分量）速度场，以及潜在的局部应变率和湍流火焰速度。该项目的成功将能够对代表性湍流火焰的此类属性进行 4D 测量，并建立可用于开发用于设计新能源设备的计算工具的多维数据集。此外，该项目结合了几个不同的学科，包括光学成像、计算机断层扫描、燃烧以及大型数据集的处理和分析。 该项目的成果将使能源、光子学和信息技术领域的从业者受益。