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

点击翻译按钮获取中文摘要

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.