Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for subject:(ICLAS). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters

1. Leshchishina, Olga. Etude expérimentale et théorique su spectre d'absorption de la vapeur d'eau vers 800nm et de la bande a¹ÎgøX³Ôgñ de l'oxygène vers 1.27 micron par spectroscopie d'absorption à très haute sensibilité : High sensitivity absorption spectroscopy in the near infrared : cRDS of the a band of oxygen near 1.27 µm and ICLAS of water isotopologues near 800 nm.

Degree: Docteur es, Physique de la matière condensée et du rayonnement, 2011, Grenoble; Institute of atmospheric optics (Tomsk, Russia)

The present thesis is devoted to two major atmospheric species – water and oxygen. The absorption spectrum of the 1Delta band of six oxygen isotopologues near was recorded by very high sensitivity CW-CRDS at room temperature and at 80 K. The magnetic dipole-allowed (0-0) band is observed for 16O2, 16O18O, 16O17O, 17O18O, 18O2 and 17O2. The first laboratory detection of extremely weak quadrupole transitions in the (0-0) band of 18O2, 16O17O, 17O2 is reported together with the (1-1) hot band of 16O2, 18O2, 16O17O and 17O2. The partly resolved hyperfine structure of the 16O17O, 17O18O, 17O2 transitions is analysed. These measurements combined with microwave and Raman data available in the literature led to the determination of the best to date spectroscopic constants for the six oxygen isotopologues, including the 17O hyperfine coupling parameters for the 1Delta state. The high resolution absorption spectra of water isotopologues (D216O, HD16O and H218O) were recorded by ICLAS and FTS in the 8800–14100 cm-1 region. The spectrum analysis based on high accuracy variational calculations provided a considerable amount of new energy levels for each of the isotopologues under consideration. The experimental energy levels derived in this study and available in the literature allowed calculating the line positions at the level of experimental accuracy in the 6100–15200 cm-1 region that extends much further the range of the present recordings.

Cette thèse est consacrée à deux espèces atmosphériques majeures: la vapeur d'eau et l'oxygène. Le spectre d'absorption de la bande 1Delta des six isotopologues de l'oxygène vers 1.27 micron a été enregistré à température ambiante et à 80 K par la technique CW-CRDS de très haute sensibilité. La bande (0-0) permise par le dipôle magnétique est observée pour les espèces 16O2, 16O18O, 16O17O, 17O18O, 18O2 et 17O2. La sensibilité expérimentale atteinte a permis de détecter pour la première fois au laboratoire (i) des transitions quadrupolaires électriques extrêmement faibles dans la bande (0-0) de 18O2, 16O17O et 17O2, (ii) la bande chaude (1-1) de 16O2, 18O2, 16O17O et 17O2 (iii) la structure hyperfine des transitions de 16O17O, 17O18O et 17O2. Ces mesures combinées avec des données micro-ondes et Raman disponibles dans la littérature ont permis de déterminer les meilleures constantes spectroscopiques à ce jour, y compris les paramètres de couplage hyperfin de 17O pour l'état 1Delta des six isotopologues de l'oxygène. Les spectres d'absorption à très haute résolution des isotopologues D216O, HD16O et H218O de la vapeur d'eau ont été enregistrés par ICLAS et FTS entre 8800 et 14100 cm-1. L'analyse du spectre basée sur les calculs variationnels de haute précision a fourni une quantité importante de nouveaux niveaux d'énergie pour chacun des isotopologues considérés. Les niveaux d'énergie expérimentaux obtenus dans cette étude et disponibles dans la littérature ont permis de calculer des positions de raies au niveau de la précision expérimentale dans la gamme 6100-15200 cm-1 qui s'étend bien…

Advisors/Committee Members: Campargue, Alain (thesis director), Naumenko, Olga (thesis director).

Subjects/Keywords: Spectroscopie d'absorption; ICLAS; CRDS; H2O; Niveaux rovibrationnels; Oxygène; Absorption spectrocopy; ICLAS; CRDS; Water; Rovibrational energy levels; Oxygen; 530

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Leshchishina, O. (2011). Etude expérimentale et théorique su spectre d'absorption de la vapeur d'eau vers 800nm et de la bande a¹ÎgøX³Ôgñ de l'oxygène vers 1.27 micron par spectroscopie d'absorption à très haute sensibilité : High sensitivity absorption spectroscopy in the near infrared : cRDS of the a band of oxygen near 1.27 µm and ICLAS of water isotopologues near 800 nm. (Doctoral Dissertation). Grenoble; Institute of atmospheric optics (Tomsk, Russia). Retrieved from http://www.theses.fr/2011GRENY029

Chicago Manual of Style (16th Edition):

Leshchishina, Olga. “Etude expérimentale et théorique su spectre d'absorption de la vapeur d'eau vers 800nm et de la bande a¹ÎgøX³Ôgñ de l'oxygène vers 1.27 micron par spectroscopie d'absorption à très haute sensibilité : High sensitivity absorption spectroscopy in the near infrared : cRDS of the a band of oxygen near 1.27 µm and ICLAS of water isotopologues near 800 nm.” 2011. Doctoral Dissertation, Grenoble; Institute of atmospheric optics (Tomsk, Russia). Accessed October 17, 2019. http://www.theses.fr/2011GRENY029.

MLA Handbook (7th Edition):

Leshchishina, Olga. “Etude expérimentale et théorique su spectre d'absorption de la vapeur d'eau vers 800nm et de la bande a¹ÎgøX³Ôgñ de l'oxygène vers 1.27 micron par spectroscopie d'absorption à très haute sensibilité : High sensitivity absorption spectroscopy in the near infrared : cRDS of the a band of oxygen near 1.27 µm and ICLAS of water isotopologues near 800 nm.” 2011. Web. 17 Oct 2019.

Vancouver:

Leshchishina O. Etude expérimentale et théorique su spectre d'absorption de la vapeur d'eau vers 800nm et de la bande a¹ÎgøX³Ôgñ de l'oxygène vers 1.27 micron par spectroscopie d'absorption à très haute sensibilité : High sensitivity absorption spectroscopy in the near infrared : cRDS of the a band of oxygen near 1.27 µm and ICLAS of water isotopologues near 800 nm. [Internet] [Doctoral dissertation]. Grenoble; Institute of atmospheric optics (Tomsk, Russia); 2011. [cited 2019 Oct 17]. Available from: http://www.theses.fr/2011GRENY029.

Council of Science Editors:

Leshchishina O. Etude expérimentale et théorique su spectre d'absorption de la vapeur d'eau vers 800nm et de la bande a¹ÎgøX³Ôgñ de l'oxygène vers 1.27 micron par spectroscopie d'absorption à très haute sensibilité : High sensitivity absorption spectroscopy in the near infrared : cRDS of the a band of oxygen near 1.27 µm and ICLAS of water isotopologues near 800 nm. [Doctoral Dissertation]. Grenoble; Institute of atmospheric optics (Tomsk, Russia); 2011. Available from: http://www.theses.fr/2011GRENY029


University of Lund

2. Alekseev, Vladimir. Laminar burning velocity of hydrogen and flame structure of related fuels for detailed kinetic model validation.

Degree: 2015, University of Lund

The laminar burning velocity and the flame structure are common targets for combustion studies aimed at detailed kinetic model development. In the present work, fuels relevant to hydrogen combustion were considered. The laminar burning velocity of rich and lean hydrogen flames was studied experimentally and numerically, including its pressure dependence in rich mixtures and temperature dependence in lean mixtures. An updated version of the Konnov detailed reaction mechanism for H2 combustion was validated, and after that it was applied to simulate the results obtained in experiments. The laminar burning velocities of rich H2 + air mixtures were determined from spherical flame propagation data using three models for stretch correction available in the literature. The heat flux method was employed for the first time to measure the laminar burning velocity of lean H2 + air mixtures and its temperature dependence. A modified procedure for processing data from unstable cellular flames was suggested, and its accuracy was evaluated. The observed difference between the literature results obtained in stretched flames and the values measured in the present work in flat flames was discussed. The trends in the temperature dependence of the burning velocity of lean H2 + air mixtures, indicated by the modeling but not supported by the majority of data determined from literature values, were confirmed experimentally in the present work. An analysis of the experimental uncertainties of the heat flux method was performed. It was shown that some of the factors which affect the accuracy of the measurements are related to the temperature dependence of the laminar burning velocity. A method to evaluate asymmetric heat fluxes in the plate of the heat flux burner was proposed. The work reported in the present study resulted in the necessity to re-evaluate some of the previously published data. Based on the available information from literature, as well as on the results obtained in the present study, recommendations were made on how to control or reduce several experimental uncertainties associated with the heat flux method. The structure of NH3 and CH4 flames was investigated with the aim of further kinetic model development. Intracavity laser absorption spectroscopy was applied to record HCO concentration profiles in rich low-pressure CH4 mixtures and predictions of two widely used kinetic models were analyzed. Minor and major species concentrations in NH3 + air flames were used to validate four contemporary H/N/O reaction schemes and investigate the performance of the best one.

Subjects/Keywords: Fysik; hydrogen combustion; laminar burning velocity; ICLAS; temperature dependence; heat flux method; Fysicumarkivet A:2015:Alekseev

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Alekseev, V. (2015). Laminar burning velocity of hydrogen and flame structure of related fuels for detailed kinetic model validation. (Doctoral Dissertation). University of Lund. Retrieved from http://lup.lub.lu.se/record/8146878 ; http://portal.research.lu.se/ws/files/3857462/8147100.pdf

Chicago Manual of Style (16th Edition):

Alekseev, Vladimir. “Laminar burning velocity of hydrogen and flame structure of related fuels for detailed kinetic model validation.” 2015. Doctoral Dissertation, University of Lund. Accessed October 17, 2019. http://lup.lub.lu.se/record/8146878 ; http://portal.research.lu.se/ws/files/3857462/8147100.pdf.

MLA Handbook (7th Edition):

Alekseev, Vladimir. “Laminar burning velocity of hydrogen and flame structure of related fuels for detailed kinetic model validation.” 2015. Web. 17 Oct 2019.

Vancouver:

Alekseev V. Laminar burning velocity of hydrogen and flame structure of related fuels for detailed kinetic model validation. [Internet] [Doctoral dissertation]. University of Lund; 2015. [cited 2019 Oct 17]. Available from: http://lup.lub.lu.se/record/8146878 ; http://portal.research.lu.se/ws/files/3857462/8147100.pdf.

Council of Science Editors:

Alekseev V. Laminar burning velocity of hydrogen and flame structure of related fuels for detailed kinetic model validation. [Doctoral Dissertation]. University of Lund; 2015. Available from: http://lup.lub.lu.se/record/8146878 ; http://portal.research.lu.se/ws/files/3857462/8147100.pdf

.