Thermometry using OH laser-induced fluorescence excitation spectra: A feasibility study
(2013) PHYM01 20131Atomic Physics
Mathematical Physics
- Abstract
- In this thesis, rotational spectra, acquired through laser-induced fluorescence (LIF) on the OH-radical, were used to evaluate temperatures in different combustion environments. By comparing experimental spectra with theoretical ones of known temperature, the temperature can be determined. A MATLAB-code has been developed that evaluates temperature by comparing experimental spectra with a library of theoretical spectra, using a least-square algorithm. The theoretical spectra database was generated with the software LIFBASE. The code was used to evaluate temperature from OH-spectra acquired from already existing excitation scans recorded in an HCCI-engine, using photofragmentation LIF (PF-LIF). The LIF-signal was detected with ICCD-cameras.... (More)
- In this thesis, rotational spectra, acquired through laser-induced fluorescence (LIF) on the OH-radical, were used to evaluate temperatures in different combustion environments. By comparing experimental spectra with theoretical ones of known temperature, the temperature can be determined. A MATLAB-code has been developed that evaluates temperature by comparing experimental spectra with a library of theoretical spectra, using a least-square algorithm. The theoretical spectra database was generated with the software LIFBASE. The code was used to evaluate temperature from OH-spectra acquired from already existing excitation scans recorded in an HCCI-engine, using photofragmentation LIF (PF-LIF). The LIF-signal was detected with ICCD-cameras. The measurements are thus spatially resolved in two dimensions. This spatial resolution was utilized to get spatially resolved, quantitative temperature measurements. Some reference excitation scans were performed during this project using both LIF and PF-LIF. These were acquired in premixed, laminar flames and in a free flow of hydrogen peroxide-vapor at ambient conditons. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/3858131
- author
- Malmqvist, Elin LU
- supervisor
- organization
- course
- PHYM01 20131
- year
- 2013
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- laser-induced fluorescence, LIF, temperature, temperature measurements, OH
- language
- English
- id
- 3858131
- date added to LUP
- 2013-10-31 14:32:33
- date last changed
- 2015-12-14 13:32:32
@misc{3858131, abstract = {{In this thesis, rotational spectra, acquired through laser-induced fluorescence (LIF) on the OH-radical, were used to evaluate temperatures in different combustion environments. By comparing experimental spectra with theoretical ones of known temperature, the temperature can be determined. A MATLAB-code has been developed that evaluates temperature by comparing experimental spectra with a library of theoretical spectra, using a least-square algorithm. The theoretical spectra database was generated with the software LIFBASE. The code was used to evaluate temperature from OH-spectra acquired from already existing excitation scans recorded in an HCCI-engine, using photofragmentation LIF (PF-LIF). The LIF-signal was detected with ICCD-cameras. The measurements are thus spatially resolved in two dimensions. This spatial resolution was utilized to get spatially resolved, quantitative temperature measurements. Some reference excitation scans were performed during this project using both LIF and PF-LIF. These were acquired in premixed, laminar flames and in a free flow of hydrogen peroxide-vapor at ambient conditons.}}, author = {{Malmqvist, Elin}}, language = {{eng}}, note = {{Student Paper}}, title = {{Thermometry using OH laser-induced fluorescence excitation spectra: A feasibility study}}, year = {{2013}}, }