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

0966627谦虚这项研究涉及预测和测量的物种和/或烟尘浓度和温度在层流以及湍流燃烧系统。虽然光学诊断已经达到了高水平的细化，它仍然很难在湍流燃烧环境中进行精确的测量。这些困难在很大程度上归因于湍流场的结构和相应的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，而且对燃烧系统中固有的热释放和化学级联以及烟灰形成都有重要影响。这个建议试图解释，使用基本的实验，分析和计算的方法，的性质的双折射辐射相互作用。智力优势：将开发非侵入式光谱辐射工具，主要根据视线技术测量层流和湍流反应流中的物质浓度和温度。测量结果将用于重建感兴趣的变量的分布，并指导这种流动的理论模型的开发和验证。这项研究的一个独特之处是包括了将用于测量伴随实验中感兴趣的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。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。相关的热传递，包括辐射热传递，用于从发电到运输的应用。研究生和本科生将在PI机构从事研究，这是加州系统的一个新的组成部分。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接触到先进的研究。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合作。

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.