Combustion of Highly Strained Hydrocarbons: Non-Intrusive Isomer Specific Detection of Complex Combustion Intermediates

1336105韦伯燃烧反应对于基础燃烧科学以及高效和清洁发动机的开发具有重要意义。 高度紧张的烃是特别感兴趣的，因为它们是高能量密度燃料的候选者。 用于火焰组成分析的已建立的技术，例如VUV光电离质谱法、IR或拉曼光谱法是困难的，因为分子可以在它们到达检测器的途中异构化，或者火焰的高温使得光谱太复杂而无法分析。 该项目开发了一种新的技术，Rydberg指纹光谱，以识别火焰中的分子化合物。 在校准和与来自分子束光电离实施的数据进行比较之后，该技术将使用雷达方法进行火焰分析。 该技术能够对复杂分子种类进行非侵入式和原位检测，并揭示对分子结构敏感而对温度不敏感的高分辨率光谱。 因此，该方法是有前途的采样火焰成分在高温下的火焰。 我们探讨了四环烷和降冰片二烯的燃烧，高度紧张的碳氢化合物的分子式C7H8。 提出的火焰诊断新方法也可用于未来的燃烧科学研究和商业应用。 该项目将涉及一名研究生，并形成学生的基础？的论文。 PI将与领导联盟，一个国家财团总部设在布朗大学提高本科生？对追求研究生教育和事业成功的兴趣。

1336105WeberCombustion reactions are of great importance for basic combustion science as well as for the development of efficient and clean engines. Highly strained hydrocarbons are of particular interest since they are candidates for high-energy density fuels. Established techniques for flame composition analysis, such as VUV photoionization mass spectrometry, IR or Raman spectroscopy are difficult because either the molecules can isomerizes on their way to a detector, or the high temperature of the flame makes spectra too complex to analyze. This project develops a novel technique, Rydberg Fingerprint Spectroscopy, to identify the molecular compounds in the flame. Following calibration and comparison with data from a molecular beam photoionization implementation, the technique will use a radar method for in-flame analysis. The technique enables non-intrusive and in-situ detection of complex molecular species and reveals highly resolved spectra that are molecular structure sensitive while being insensitive toward temperature. Consequently, the method is promising for sampling flame components at the high temperature of a flame. We explore the combustion of quadricyclane and norbornadiene, highly strained hydrocarbons with the formula C7H8. The proposed new method for flame diagnostics can also be used for future combustion science studies and for commercial implementations. The project will involve one graduate student and form the basis of the student?s dissertation. The PI will work with Leadership Alliance, a national consortium headquartered at Brown University enhancing undergraduate students? interest in pursuing graduate education and success in their careers.