Advanced radiation models to enable direct comparisons between computed and measured temperatures and compositions in laminar and turbulent flames

先进的辐射模型可以直接比较计算和测量的层流和湍流火焰中的温度和成分

• 批准号: 1604446
• 负责人: Daniel Haworth
• 金额: $ 21万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1604446&HistoricalAwards=false
• 关键词: Advanced; radiation; models; enable; direct

1604446 - HaworthCombustion will continue to play a central role in propulsion and power generation for the foreseeable future. This includes engines for light- and heavy-duty road vehicles (cars and trucks). Aggressive fuel economy and emissions targets have been established to simultaneously reduce energy consumption and pollutant emissions, including greenhouse-gas emissions. At the same time, alternatives to petroleum-derived fuels (e.g., biofuels) are being introduced to reduce the carbon footprint of combustion-based energy systems. Predictive mathematical/computational tools are urgently needed so that engineers can optimize future engines and other combustion systems for maximum performance with minimum fuel consumption and emissions, while enabling the introduction of future sustainable fuels. These tools must include accurate representations of the key underlying physical processes. Radiative heat transfer is important in combustion systems, by virtue of their high temperatures, but has received relatively little attention to date because of its extreme complexity. This project will develop advanced radiation models that will be an important part of a new generation of predictive mathematical/computational tools, which in turn will enable the introduction of a new generation of high-efficiency, low-emissions, alternative-fuel vehicles.High-resolution optical diagnostics and numerical simulations are increasingly being brought to bear to provide fundamental insight into the underlying physical processes in engines and other combustion systems, and to inform the development of reduced-order models that can be used for device and system design. However, the connection between experiment and numerical simulation/modeling remains somewhat primitive. For example, extensive simplification and modeling are required to provide quantitative values of temperature and equivalence-ratio distributions from measured radiative intensities for nonintrusive optical diagnostics techniques. At the same time, increasingly sophisticated models for spectral radiative heat transfer are being developed for computational fluid dynamics (CFD)-based simulations of turbulent reacting flows, and these models provide an ideal starting point for directly computing the radiative intensity signals that correspond to various optical diagnostics techniques. By the end of this project, two important diagnostic techniques will have been developed/advanced for applications to harsh high-pressure combustion environments such as those in piston engines, simulation models will have been extended to directly compute radiative intensity signals corresponding to these diagnostic techniques, and a proof-of-concept of the advantages of making direct comparisons between computed and measured radiative intensities (versus derived quantities, such as temperature and equivalence ratio) will have been completed.

160446-在可预见的将来，HaworthCombustion将继续在推进和发电中发挥核心作用。这包括用于轻型和重型公路车辆（汽车和卡车）的发动机。已经建立了积极的燃油经济性和排放目标，以同时减少能源消耗和污染物排放，包括温室气体排放。同时，正在引入石油衍生的燃料（例如生物燃料）的替代品，以减少基于燃烧的能量系统的碳足迹。迫切需要进行预测性数学/计算工具，以便工程师可以优化未来的发动机和其他燃烧系统，以最大程度的性能，并以最少的油耗和排放量，同时可以引入未来的可持续燃料。这些工具必须包括对钥匙基础物理过程的准确表示。辐射传热在燃烧系统中很重要，由于其高温，但由于其极端的复杂性，迄今为止，人们的关注较少。 This project will develop advanced radiation models that will be an important part of a new generation of predictive mathematical/computational tools, which in turn will enable the introduction of a new generation of high-efficiency, low-emissions, alternative-fuel vehicles.High-resolution optical diagnostics and numerical simulations are increasingly being brought to bear to provide fundamental insight into the underlying physical processes in engines and other combustion systems, and to inform the development of reduced-order可用于设备和系统设计的型号。但是，实验和数值模拟/建模之间的联系仍然有些原始。例如，需要进行广泛的简化和建模，以提供来自非感染光学诊断技术的辐射强度的温度和等效比率分布的定量值。同时，正在开发用于光谱辐射传热的越来越复杂的模型用于计算流体动力学（CFD）基于湍流反应流的模拟，这些模型为直接计算与各种光学诊断技术相对应的辐射强度信号提供了理想的起点。到该项目结束时，将开发/先进两种重要的诊断技术，以应用于施加严格的高压燃烧环境，例如在活塞发动机中，模拟模型将被扩展到直接计算与这些诊断技术的辐射强度相对应的辐射强度信号，以及在计算的范围和量化的优势（对这些诊断的优势）的范围，并导致散布的优势（使其范围内的范围），以相比的范围（以相比的范围），以相比的范围（以相比的范围），并在计算的范围内散布了范围，并将其与范围相提并论（对相比的范围降低了范围，并将其范围散布在范围内，并散布了范围的范围（以相比的范围），并将其范围散布在范围内，并将其范围散布在范围内，并将其范围散布到范围等效比率将完成。