Time-Resolved Simultaneous Determination of Local Temperature and Species Concentration in Liquid Petrol Gas Injection Using Laser-Induced Gratings

在该项目中，激光诱导光栅（LIGs）技术将被用来完成同时空间和时间分辨的温度和物种浓度的测量。在过去，该技术已被用于确定已知浓度下的温度，反之亦然。在与D.N.博士合作的初步调查中，Kozlov（A.M. Prokhorov General Physics Institute，Russian Academy of Sciences）在6个月DFG项目的框架中，申请人可以证明该方法具有同时导出二元混合物中的两个参数的潜力。相应的报告附后，下文将提及。本项目的目标是详细的实验和理论研究的潜力和适用性的测量技术有关的同时确定的温度，燃料-空气比，和流速的混合气形成过程的调查在加压燃料喷射。这些研究是必要的，使这种有前途的方法可在未来的工作，这种应用。在第一年和第二年，重点将放在开发用于温度和浓度测量的LIGs技术上。除了实验研究的技术进一步发展和改进的理论计算和数据评估程序，考虑到所涉及的物理机制，是必要的。使用LIGs获得的结果将通过相干反斯托克斯拉曼光谱（汽车）进行验证，该光谱在LTT中得到了很好的建立。在第三年期间，计划测量喷射室内的燃料流速。在该项目中，开发的方法将在实验室加压燃油喷射系统中进行演示和测试。实验和理论工作将与D.N.博士密切合作。科兹洛夫和他在GPI的同事这将确保快速进展，因为他们在激光诱导光栅和非线性光谱学方面拥有长期的经验和知识。

In the project the laser-induced gratings (LIGs) technique will be utilized to accomplish simultaneous spatially- and temporally-resolved measurements of temperature and species concentration. In the past the technique has been used to determine temperatures at known concentrations and the other way round. In preliminary investigations in collaboration with Dr. D.N. Kozlov (A.M. Prokhorov General Physics Institute, Russian Academy of Sciences) in the framework of a 6 month DFG project the applicants could show that the method has the potential to derive both parameters in binary mixtures at the same time. The corresponding report is attached and in the following it will be referred to. The objective of this project is a detailed experimental and theoretical study of the potential and the applicability of the mentioned measurement technique as related to simultaneous determination of temperature, fuel-air ratio, and flow velocity in investigations of the mixture formation process during pressurized fuel injection. These studies are necessary to make this promising method available in future works for this kind of application. Within the first and second years the focal point will be laid on the development of the LIGs technique for temperature and concentration measurements. Besides the experimental investigation of the technique further development and improvement of the theoretical calculations and data evaluation procedures, that take into account physical mechanisms involved, is required. The results obtained using LIGs will be verified by coherent anti-Stokes Raman spectroscopy (CARS), which is well established at the LTT. During the third year measurements of fuel flow velocity inside the injection chamber are planned. Within this project the developed methods will be demonstrated and tested in a laboratory pressurized fuel injection system. The experimental and theoretical work will be conducted in close cooperation with Dr. D.N. Kozlov and his co-workers in the GPI. This will ensure fast progress since they have long-time experience and knowledge regarding laser-induced gratings and nonlinear spectroscopy.