Valid from: Spring 2018
Decided by: FN1/Anders Gustafsson
Date of establishment: 2015-01-22
Division: Combustion Physics
Course type: Course given jointly for second and third cycle
The course is also given at second-cycle level with course codes: FBRN01, FBR024, FYST28
Teaching language: Swedish
The aim of the course is to provide a fundamental understanding (based on physics) of the potential for laser-based techniques to non-intrusively measure parameters such as species concentrations and temperatures in combustion processes. Of central importance is interaction between radiation and matter, lasers and their characteristics, optics, optical measurement techniques, molecular physics and combustion. The unique information that can be obtained from combustion processes using laser techniques can together with advanced modelling lead to improved detailed knowledge about combustion. Such understanding is highly important to improve efficiency and decrease harmful emissions, which is of global importance since 90% of the energy usage in the world can be related to combustion processes.
Knowledge and Understanding
For a passing grade the doctoral student must
Competences and Skills
For a passing grade the doctoral student must
In the initial part of the course some topics are presented and discussed which for students with different backgrounds will mean repetition and extension to some degree. The areas that are treated are molecular spectroscopy, combustion, and experimental equipment for laser-based diagnostics (Laser properties, laser types, optics, detectors, optical signal collection). Comparison are made between probe methods and optical methods. A detailed discussion is made of the most important methods for combustion diagnostics. They mainly include Rayleigh scattering, Raman scattering, laser-induced incandescence (LII), laser-induced fluorescence (LIF), coherent anti-Stokes Raman spectroscopy (CARS), particle-image velocimetry (PIV) and thermographic phosphors. The techniques are discussed from their physical background and the analysis of measurement data performed for evaluation of relevant parameters such as species concentrations, temperature, velocities, particle properties, etc. Emphasis is put on identifying the potential and the limitations of the techniques. The scientific papers studied by the students in their projects should be close to the front line of research and present extensions of the already discussed techniques. Orientation about new techniques developed within the research field is made. Frequently during course demonstrations are made in the research laboratories of the division to illustrate different parts of the course. The laboratory exercises are laser-induced incandescence and laser-induced fluorescence. The laboratory exercise on LII treats measurements of soot concentrations in flames, and the one in LIF treats visualisation of flame radicals, such as OH (hydroxyl radical). Both exercises are relatively student-oriented where the students take relatively big part in the assembly, alignment and optimisation of the experimental setup
Eckbreth, A.C.: Eckbreth, A.C: Laser Diagnostics for Combustion Temperature and Species, och utdelat material.. Gordon and Breach, 1996.
Types of instruction: Lectures, seminars, laboratory exercises, exercises, project, study visit
Examination formats: Written exam, seminars given by participants
Grading scale: Failed, pass
Examiner:
Assumed prior knowledge: Basic knowledge about lasers, atom- and molecular physics.
Scheduled for LP3. Replaces FBR024F.
Course coordinators:
Web page: http://www.forbrf.lth.se/english/education/courses/laser_based_combustion_diagnostics/