SBIR Phase II: Non-Intrusive Diagnostics for Sooting Combustion Systems

*Serio 9204322这一小型企业创新研究第二阶段将结合断层扫描、Hadamard信号编码和获得专利的傅立叶变换红外(FT-IR)发射/传输(E/T)技术，在燃烧过程中执行空间和时间分辨率的烟尘和气体物种测量。燃烧过程中最重要的过程之一是烟尘的形成和破坏。烟尘浓度控制着火焰辐射的能量，烟尘破坏的有效性控制着燃烧装置的燃烧效率和环境可接受性。FT-IR E/T光谱是目前唯一一种同时测量燃烧气流中气体成分和温度以及碳烟颗粒尺寸、数密度和温度的手段。在第一阶段完成了开发和验证FT-IR E/T层析成像火焰光谱方法的工作。在第一阶段取得的主要进展是纳入和演示了用于FT-IR层析成像的Hadamard数据处理。阿达玛技术的主要目标是增加信号吞吐量，增加S/N，并提高测量速度。这一点在FT-IR断层扫描中得到了验证，但Hadamard技术也大大简化了断层扫描设备。在同环扩散火焰上的实验清楚地表明，该技术可以识别隐藏的三维结构。第二阶段计划将极大地提高时间分辨率，并开发实际探测光学通道有限的燃烧室的技术。FT-IR E/T仪器可以检测作为碳烟的重要前体的物种，并有望在了解碳烟形成的化学和物理方面取得进展。第二阶段计划将导致开发一种低成本(5万美元以下)、便携式、多功能的现场燃烧诊断仪器，可应用于燃烧过程控制、污染监测或研发。应用范围包括工业燃气轮机、工业和民用熔炉、公用锅炉、过程加热器、喷气发动机和柴油发动机的测量。*p：\sbir\yhashimi\9204322b.doc

*** Serio 9204322 This Small Business Innovation Research Phase II will combine tomography, Hadamard signal encodement, and a patented Fourier Transform Infrared (FT-IR) emission/transmission (E/T) technique to perform spatially and temporally resolved soot and gas species measurements during combustion. One of the most important processes in combustion is the formation and destruction of soot. The concentration of soot controls the energy radiated by the flame and the effectiveness of soot destruction controls the combustion efficiency and the environmental acceptability of the combustion device. FT-IR E/T spectroscopy is currently the only means of simultaneous measurement of gas species compositions and temperatures and soot particle size, number density and temperature in a combustion flow. The effort to develop and validate the method of FT-IR E/T tomographic spectroscopy for sooting flames was accomplished during Phase I. The major advance achieved during Phase I was the inclusion and demonstration of Hadamard data processing as applied to FT-IR tomography. The primary objective of the Hadamard technique is to increase signal throughput, increase S/N and increase the speed of measurement. This was demonstrated for FT-IR tomography, but the Hadamard technique also adds a significant simplification in the tomography apparatus. Experiments on a co-annular diffusion flame clearly showed that the technique can identify hidden three-dimensional structure. The Phase II program will greatly improve time resolution and develop techniques for practically probing combustors that have limited optical access. The FT-IR E/T instrument can detect species which are important precursors to soot and is expected to lead to advances in understanding the chemistry and physics of soot formation. The Phase II program will lead to the development of a low-cost (under $50,000), portable, versatile, in-situ combustion diagnostic instrument which can be applied to combustion process control, pollution monito ring, or research and development. Applications include measurements in industrial gas turbines, industrial and residential furnaces, utility boilers, process heaters, jet engines, and diesel engines. *** p:\sbir\yhashimi\9204322b.doc