Detailed investigation of the combustion of gaseous fuels at pressure levels up to 200 bar

气体燃料在运输和发电方面的兴趣越来越大。它们可以从天然气储层中获得或通过气化过程合成生产。目前的研究还调查了从生物质或电力中生产气体燃料的机会，为整体二氧化碳足迹较低的可持续燃料生产开辟了道路。取决于来源，这些燃料可具有显著改变的组成，其对燃气发动机或燃气涡轮机的燃烧性能和可操作性限制具有直接影响。在这方面，需要详细了解各种燃料组合物的燃烧行为，以实现最大效率和最小污染物排放。虽然可以在文献中找到关注高温或较低压力的各种基本先前工作，但缺乏与现代燃气发动机高度相关的高压和低温状态的信息。本提案的目的是通过实验和理论相结合的方法提供这一关键信息。将在独特的高压快速压缩机（RCM）和激波管（ST）中对空气混合物中未稀释燃料在较高压力（> 50 bar）下的点火延迟时间（IDT）进行测量。这些测量提供了有关燃料反应性和自燃倾向的重要信息。此外，这些实验结果将有助于优化动力学模型，并作为以前无法研究的条件下的验证目标。最后，将从气体取样实验中获得更详细的信息。在这种技术的帮助下，可以从反应器中提取气体样品，以识别在自燃过程中形成的中间物质。这类信息对于实现更准确和鲁棒的动力学模型是非常有价值的。由此产生的动力学模型，然后可以在计算机辅助工程设计最佳的燃烧室布局和分析污染物的形成。

Gaseous fuels are of rising interest in transport and electricity generation. They can be obtained from natural gas reservoirs or synthetically produced via gasification processes. Current research also investigates the opportunity to produce gaseous fuels from biomass or power opening pathways for a sustainable fuel production with an overall low carbon dioxide footprint. Depending on the source, these fuels can have significant altering compositions which have a direct impact on the combustion performance and operability limits of gas engines or gas turbines. On this regard, a detailed understanding of the combustion behavior of the various fuel compositions is required in order to achieve maximum efficiency and minimum pollutant emissions. While various fundamental previous works focusing on high temperatures or lower pressures can be found in literature, there is a lack of information in the high-pressure and low-temperature regime that is highly relevant for modern gas engines. The aim of the present proposal is to provide this critical information by a combined experimental and theoretical approach. Ignition delay time (IDT) measurements at higher pressures (> 50 bar) for non-diluted fuel in air mixtures will be performed in a unique high-pressure rapid compression machine (RCM) and a shock tube (ST). These measurements give vital information regarding the fuel’s reactivity and auto-ignition tendency. Furthermore, these experimental results will help to optimize kinetic models and serve as validation targets for conditions that couldn’t be investigated before. Finally, more detailed information will be obtained from gas sampling experiments. With the help of this technique, gas samples can be taken from the reactor in order to identify intermediate species that are formed during the auto-ignition process. This kind of information is highly valuable for achieving more accurate and robust kinetic models. The resulting kinetic models can then be used in computer-aided engineering for designing optimal combustor layouts and analyzing the formation of pollutants.