Radiation Tools for the Determination of Temperatures and Concentrations from Radiometric Measurements in Laminar and Turbulent Combustion Systems

0966627莫德斯特这项研究涉及预测和测量层流和湍流燃烧系统中的种类和/或烟灰浓度和温度。尽管光学诊断已经达到了很高的精细化水平，但在湍流燃烧环境中进行精确测量仍然非常困难。这些困难很大程度上归因于湍流流场结构与相应辐射场之间的高度非线性相互作用。这些相互作用不仅使测量变得困难，而且对热量释放和化学级联以及燃烧系统固有的烟灰形成都有重要影响。本建议试图用基本的实验、分析和计算方法来解释湍流-辐射相互作用的本质。智力优势：将开发非侵入式光谱辐射工具，主要基于视线技术，用于测量层流和湍流反应流中的物质浓度和温度。这些测量将用于重建感兴趣的变量的分布，并指导开发和验证这些流的理论模型。该研究的一个独特方面是包含了用于测量同伴实验中感兴趣的数量的仪器的预测响应。这种能力减少了测量和预测之间比较的不确定性，并增加了我们对潜在物理现象的理解。该预测模型基于传输PDF方法。更广泛的影响：湍流燃烧与美国使用的大部分能源的生产和/或转换有关。相关的传热，包括辐射传热，被用于从发电到运输的各种应用中。研究生和本科生将在PIs机构从事研究，这是加州大学系统的一个新组成部分。本科生将主要负责进行实验测量，让来自代表性不足群体的学生有机会接触到先进的研究。合作将与爱德华兹空军基地和桑迪亚国家实验室的研究人员进行。

0966627ModestThis research involves the prediction and measurement of species and/or soot concentrations and temperatures in laminar as well as turbulent combustion systems. Although optical diagnostics have reached high levels of refinement, it remains very difficult to make accurate measurements in turbulent combustion environments. The difficulties are largely attributable to the highly non-linear interactions between the structure of the turbulent flow field and the corresponding radiation field. Not only do these interactions make measurements difficult, they also have an important effect on both the heat release and the chemical cascading as well as soot formation that is inherent in combustion systems. This proposal seeks to explain, using fundamental experimental, analytical and computational approaches, the nature of the turbulence-radiation interaction. Intellectual Merit: Nonintrusive spectral radiation tools will be developed to measure species concentrations and temperatures in both laminar and turbulent reacting flows, based primarily on line-of-sight techniques. The measurements will be used to reconstruct the distributions of the variables of interest, and guide the development of, and validate theoretical models for such flows. One unique aspect of the research is inclusion of the predicted response of instrumentation that would be used to measure the quantities of interest in a companion experiment. This capability reduces the uncertainties in comparisons made between measurements and predictions, and increases our understanding of the underlying physical phenomena. The predictive model is based upon the transported PDF method.Broader Impacts: Turbulent combustion is associated with production and/or conversion of most of the energy used in the U.S. The associated heat transfer, including the radiation heat transfer, is utilized in applications ranging from electric power generation to transportation. Graduate and undergraduate students will be engaged in the research at the PIs institution, which is a new component of the University of California System. Undergraduate students will be primarily responsible for making the experimental measurements, giving students from underrepresented groups important exposure to advanced research. Collaboration will be made with researchers at Edwards Air Force Base and Sandia National Laboratories.