SBIR Phase I: Statistical Absorption Tomography for Turbulent Flows

SBIR 第一阶段：湍流统计吸收断层扫描

• 批准号: 9860178
• 负责人: Yudaya Sivathanu
• 金额: $ 10万
• 依托单位: EN'URGA INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9860178&HistoricalAwards=false
• 关键词: SBIR; Phase; Statistical; Absorption; Tomography

9860178 This Small Business Innovation Research Phase I project will test the feasibility of applying a novel statistical absorption tomography technique to retrieve local properties from path integrated measurements made in turbulent flows. Tomographic techniques are widely used in the medical field, but are restricted to time-invariant phenomena, such as laminar flows or stationary objects. There are two distinguishing features of the proposed high resolution statistical tomography that will be demonstrated during the Phase I research effort: (1) a statistical deconvolution technique which will determine the local Probability Density Functions (PDFs) of specific absorption coeffcient with the spatial and temporal resolution necessary to characterize turbulent flows, and (2) a laser sheet/diode array system which has the capability to obtain the high resolution measurements required for the statistical tomographic technique. Local PDFs of specific absorption coefficients are required for non-intrusive monitoring of the particulate and gas species concentrations in a wide variety of turbulent flows. Specific applications include pollution control in smoke stacks, process control in power plants, stability control in gas turbine engine premixers, and manufacturing control in metal and ceramic powder processing. The proposed technology is designed to provide a new process monitoring tool for particulate and gas species concentrations in industrial flows and has immediate commercial utility in the power plant, powder processing and gas turbine industries.

9860178这个小型企业创新研究阶段I项目将测试应用新颖的统计吸收层析成像技术的可行性，以从湍流中的路径集成测量中检索局部特性。层析成像技术被广泛用于医疗领域，但仅限于时间不变的现象，例如层流流或固定物体。提出的高分辨率统计层析成像的两种区别特征将在I期研究工作中证明：（1）一种统计反向卷积技术，该技术将确定特定吸收系数的局部概率密度函数（PDF），其空间和时间分辨率是为了获得较高的湍流/DII的较高范围的空间和时间分辨率所必需的，并获得了较高的速度/DII，并（2）具有激励能力/DIIDIE的能力。统计断层扫描技术。 在多种湍流中对颗粒物和气体浓度进行非侵入性监测所必需的特定吸收系数的局部PDF。特定的应用包括在烟雾堆中进行污染控制，发电厂中的工艺控制，燃气轮机发动机预制器中的稳定性控制以及金属和陶瓷粉处理中的制造控制。拟议的技术旨在为工业流中的颗粒物和气体浓度提供新的工艺监测工具，并在发电厂，粉末加工和燃气轮机行业中立即具有商业用途。