Filtered Rayleigh scattering instrumentation for diagnostics of high-pressure combustion systems emitting nano soot aerosols

与所要求的设备相关的研究计划旨在控制和减少航空，地面运输和电力生产发动机的烟尘气溶胶排放。 燃烧过程中烟尘气溶胶的产生仍然是最具挑战性的技术领域之一，需要所需的实验设备来推进该领域。尽管燃气轮机和柴油机的运行涉及分别达到约50和150大气压的燃烧压力，但对烟灰气溶胶形成的知识的缺乏在高压燃烧下甚至更为粗略。在易处理的条件下，现场非侵入性测量是必不可少的，以解开煤烟气溶胶形成的物理和化学。在我们目前的实验设施中，唯一缺少的诊断是空间分辨温度测量能力。在含烟尘的火焰中，最适合的温度测量方法之一是过滤瑞利散射技术，其中烟尘颗粒产生的过多噪声被过滤掉。因此，所要求的设备是一个过滤瑞利散射系统，能够非侵入式平面测量的温度场在复杂的反应流的代表内燃机。我们在UTIAS的研究小组有几个实验测试台，每个对应于不同复杂的内燃机。其中之一是一个高压室与光学访问，并能够产生稳定和易于处理的扩散火焰高达100大气压燃烧气体和液体的传统和生物质燃料。我们是该领域世界领先的研究小组，在压力达到100 atm的情况下进行了易于处理的测量和数值模拟。然而，我们缺乏可靠的非侵入式和空间分辨的温度测量能力，这是我们世界级实验装置中必不可少但缺失的元素。所要求的设备将满足我们的测量要求，并将提供一个阶跃变化，使我们能够研究压力、湍流和燃料化学结构对实际发动机典型条件下燃烧中碳烟形成的影响。

The research programs associated with the requested equipment aims controlling and reducing soot aerosol emissions from engines for aviation, ground transportation, and power production. Production of soot aerosols in combustion remains one of the most challenging technological fields and the requested experimental equipment is required to advance the field. The lack of knowledge of soot aerosol formation is even sketchier at high-pressure combustion although the operation of gas turbines and diesel engines involves combustion pressures reaching to about 50 and 150 atm, respectively. In situ non-intrusive measurements are essential under tractable conditions to unravel the physics and chemistry of soot aerosol formation. In our current experimental facilities, the only missing diagnostics is the spatially-resolved temperature measurement capability. In soot containing flames, one of the best suited methods for temperature measurements is the filtered Rayleigh scattering technique in which excessive noise contributed by soot particles is filtered out. So the requested equipment is a filtered Rayleigh scattering system capable of non-intrusive planar measurements of temperature fields in complex reacting flows representative of combustion engines. Our research groups at UTIAS have several experimental test rigs each corresponding to different complexities of combustion engines. One of them is a high-pressure chamber with optical access and capable of producing stable and tractable diffusion flames up to 100 atm burning gaseous and liquid conventional and biomass based fuels. We are the leading research group in the world in this area by making tractable measurements and numerical simulations at pressures reaching 100 atm. However, we lack a reliable non-intrusive and spatially resolved temperature measurement capability which is an essential but missing element of our world-class experimental setup. Requested equipment will complete our measurement requirements and will provide a step-change in our capability to investigate the influence of pressure, turbulence and fuel chemical structure on soot formation in combustion at conditions representative of practical engines.