Creating Three-Dimensional Fundamental Flame Database Using Novel Diagnostics

使用新颖的诊断创建三维基本火焰数据库

• 批准号: 1839603
• 负责人: Lin Ma
• 金额: $ 31.89万
• 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: 2019
• 资助国家: 美国
• 起止时间: 2019-03-01 至 2024-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1839603&HistoricalAwards=false
• 关键词: Creating; Three; Dimensional; Fundamental; Flame

Many open questions remain in the study of turbulent combustion, hindering the design of next-generation energy systems. A key gap in our knowledge is the lack of proper experimental data that can be used to validate and inspire predictive models. Due to the inherent three-dimensional (3D) spatial structures of practical turbulent flames, instantaneous 3D measurements of fundamental flame properties have been long desired for use in model development. However, existing experimental efforts are predominately limited to obtaining data at a point, along a line, or across a 2D plane. This project is to develop novel diagnostics that can enable 3D measurements in flames. These valuable experimental data will be used for model validation and development. The knowledge generated in this project will help with the design and optimization of propulsion and energy systems utilizing combustion. Additional efforts in this project include establishing collaborations across boundaries of disciplines and institutions as well as engaging industry to accelerate technology transfer.Turbulent combustion is governed by the intricate interactions between chemical reactions and turbulence. Such interactions inherently occur in 3D, and consequently measurements that can resolve the variations of combustion properties in all three dimensions have long been desired. This project will address this long-standing need with a two-phase plan. In the first phase, the team will investigate and utilize three novel 3D diagnostic techniques, including high resolution tomography, machine learning assisted diagnostics, and hybrid 3D diagnostics. In the second phase, the team will apply these new diagnostics to obtain 3D measurements of fundamental combustion properties in canonical turbulent flames. The target properties include 3D flame topography and 3D-3-component velocity. Both are crucial for understanding turbulent flame dynamics and improving model accuracy. This research is highly interdisciplinary and can contribute to fundamental combustion science, optical diagnostics, and computational modeling.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

湍流燃烧的研究中仍然存在许多悬而未决的问题，阻碍了下一代能源系统的设计。我们知识中的一个关键差距是缺乏可用于验证和启发预测模型的适当实验数据。由于实际湍流火焰固有的三维 (3D) 空间结构，长期以来人们一直希望在模型开发中使用基本火焰特性的瞬时 3D 测量。然而，现有的实验工作主要局限于获取一点、沿线或跨二维平面的数据。该项目旨在开发能够在火焰中进行 3D 测量的新型诊断方法。这些有价值的实验数据将用于模型验证和开发。该项目中产生的知识将有助于设计和优化利用燃烧的推进和能源系统。该项目的其他工作包括建立跨学科和机构边界的合作，以及吸引行业加速技术转让。湍流燃烧是由化学反应和湍流之间复杂的相互作用控制的。这种相互作用本质上发生在 3D 中，因此长期以来人们一直希望能够解决所有三个维度上燃烧特性变化的测量。该项目将通过两阶段计划来满足这一长期需求。在第一阶段，该团队将研究和利用三种新颖的 3D 诊断技术，包括高分辨率断层扫描、机器学习辅助诊断和混合 3D 诊断。在第二阶段，该团队将应用这些新的诊断方法来获得规范湍流火焰中基本燃烧特性的 3D 测量结果。目标属性包括 3D 火焰形貌和 3D-3 分量速度。两者对于理解湍流火焰动力学和提高模型精度都至关重要。这项研究是高度跨学科的，可以为基础燃烧科学、光学诊断和计算建模做出贡献。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Correction of Beam Steering for Optical Measurements in Turbulent Reactive Flows

湍流反应流中光学测量的光束转向校正

• 发表时间: 2021
• 期刊: SAE technical papers
• 作者: Ke Zhou, Lin Ma