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Design of a Flow Controlled Heterogeneous Combustor with Multiple Instrumentation Techniques for the In-Situ Evaluation of Combustion Catalysts

机译:具有多种仪表技术的流量控制异构燃烧器的设计,用于原位评价燃烧催化剂

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Heterogeneous combustion is an advanced combustion technique which incorporates a highly porous ceramic within a combustion chamber. Placing a porous solid within the combustion chamber enables heat recirculation which is not present in homogenous combustion and as a result such combustion technology can enable enhanced lean burning operation, reduced emissions of CO and NO_x, and increase in the maximum stable flame speed compared to laminar flames [1]. A novel design for a robust heterogeneous combustor is presented which does not feature flow modifying devices to control the flame position and instead, relies on the control of fuel and air mixtures to position the flame; it is the intention to utilize this combustor to examine various novel catalysts to assist combustion. Demonstration of the combustor is done using a methane-air fuel mixture along with an uncoated silicon carbide (SiC) media of 10 pores per inch (ppin) within the combustion chamber, though it is also possible to utilize various liquid fuels with this combustor. This combustor also includes several instrumentation devices, axial thermocouples, exhaust gas sampling, and a novel instrumentation technique for heterogeneous combustors: an externally mounted thermocouple which enables for the collection and analysis of acoustic emissions from the combustor exhaust.
机译:异质燃烧是一种先进的燃烧技术,其在燃烧室内掺入高度多孔陶瓷。在燃烧室内置于燃烧室内的多孔固体使热再循环不存在于均匀燃烧中,并且由于这种燃烧技术可以实现增强的稀燃燃烧操作,减少CO和NO_X的排放,与Laminar相比的最大稳定火焰速度增加火焰[1]。提出了一种新颖的设计要健壮异质燃烧器不流动特征修改设备以控制火焰的位置,而是,依赖于燃料和空气混合物的控制来定位火焰;有意利用这种燃烧器来检查各种新型催化剂以帮助燃烧。燃烧器的示范是使用甲烷 - 空气燃料混合物以及在燃烧室内每英寸(PPIN)的10个孔的未涂覆的碳化硅(SiC)培养基进行完成,尽管也可以利用具有这种燃烧器的各种液体燃料。该燃烧器还包括多个仪器,轴向热电偶,废气采样和用于异构燃烧器的新颖仪表技术:外部安装的热电偶,其能够用于收集和分析来自燃烧器排气的声学发射。

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