Decomposition kinetics of organic fluorescence tracers under IC-engine-like conditions:Shock-tube experiments and kinetic modeling

类似 IC 发动机条件下有机荧光示踪剂的分解动力学：激波管实验和动力学建模

基本信息

批准号：
51237073
负责人：
Professor Dr. Ulrich Maas
金额：
--
依托单位：
Institut für Energie- und Material-Prozesse (EMPI)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2007
资助国家：
德国
起止时间：
2006-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/51237073?language=en
关键词：
Decomposition kinetics organic fluorescence tracers

项目摘要

Innovative concepts for internal combustion engines like homogeneous-charge compression ignition (HCCI) require a detailed knowledge about the gas mixture prior to ignition. The use of tracers and fluorescing fuel compounds for fuel-concentration visualization based on laserinduced fluorescence (LIF) has grown to an important engineering tool over the last two decades and has proven indispensable in SI (spark-ignition) engine research. It is highly desirable to transfer these techniques to HCCI or Diesel environments. However, the tracers exhibit limited stability at high temperature and partially decompose together with the base fuel in the pre-ignition phase. This up to now hinders the interpretation of the observed fluorescence signals, but on the other hand would allow to extract information about pre-ignition chemistry that would be valuable for further insight into the auto ignition process. On the other hand, the potential influence of the tracer on the ignition characteristics of the base fuel has mostly been ignored in the past. We propose to improve the fundamental basis for quantitative, multi-dimensional tracer-LIF measurements for the observation of fuel mixing and pre-ignition chemistry. This will be done by a combination of shock-tube experiments and kinetic modeling. The objectives of the project are (a) to evaluate the tracer decomposition kinetics in order to enable quantitative measurements in auto-igniting environments (b) to investigate ignition of fuel/tracer mixtures in order to ensure conditions where the engine performance is not affected by the tracer, (c) to study the tracer spectroscopy at high temperatures to allow for quantitative signal interpretation. The work will be done in a collaboration of IVG, Universität Duisburg-Essen (experiments) and ITT, Universität Karlsruhe (modeling).

内部组合发动机（如均相电荷压缩点火（HCCI））的创新概念需要在点火之前对气体混合物的详细知识。在过去的二十年中，示踪剂和荧光燃料化合物用于基于激光引起的荧光（LIF）的燃料浓度可视化已成为重要的工程工具，并且在SI（Spark-Distionition）发动机研究中证明是必不可少的。非常需要将这些技术传输到HCCI或柴油环境。然而，示踪剂在高温下暴露了有限的稳定性，并在预点击阶段部分分解了基础燃料。到目前为止，这阻碍了观察到的荧光信号的解释，但另一方面，它可以提取有关预点击化学的信息，这对于进一步了解自动点火过程非常有价值。另一方面，示踪剂对基本燃料的点火特性的潜在影响大多被忽略了。我们建议改善定量，多维示踪剂-LIF测量的基本基础，以观察燃料混合和预点击化学。这将通过冲击管实验和动力学建模的组合来完成。该项目的目标是（a）评估示踪剂分解动力学，以便在自动引入环境中进行定量测量（b），以调查燃料/示踪剂混合物的点火点火，以确保发动机性能不受示踪剂的影响（c）以高度允许数量允许数量的信号允许，以确保发动机的性能不受示踪剂的影响。这项工作将在IVG的Duisburg-Essen大学（实验）和ITT，Universitätkarlsruhe（建模）的合作中完成。