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:

You searched for subject:(O2 rotational structure). One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters

1. Wu, Yue. Measurements of Methyl Radicals and Temperatures by using Coherent Microwave Rayleigh Scattering from Resonance Enhanced Multiphoton Ionization.

Degree: 2015, University of Tennessee – Knoxville

This thesis includes two main parts: (I) The CH3[methyl radical] detection in methane/air flames and (II) the rotational temperature measurement of O2[molecular oxygen] in a variety of environments by using coherent microwave Rayleigh scattering from resonance enhanced multiphoton ionization (Radar REMPI). In first the part, from Chapter I to Chapter III, the methyl radical detection and quantitative measurements have been conducted in hydrocarbon flame with one-dimensional and two-dimensional spatial-resolved concentration distribution. Due to the proximity of the argon resonance state (4+1 REMPI by 332.5 nm) with the CH3 state (2+1 REMPI by 333.6 nm), in situ calibration with argon was performed to quantify the absolute concentration of CH3. The numerical simulations performed using the detailed kinetic mechanism of GRI-3.0 were also provided in the comparison between experimental results and numerical calculations. The details of experimental results and discussions have been reported in Chapter I, II, and III. In the second part, the O2 rotational temperature has been measured using Radar REMPI. The Rydberg state C3Π[C3Pi] has been selected as the intermediate state of O2 in the 2+1 REMPI process, the rotational-resolved spectra from two-photon C3Π←←X3Σ[X3Sigma] transition have been obtained in a variety of conditions from room temperature (294K) to flame temperature (1658 K). The temperature extraction based on the Boltzmann plots has been used in Chapter IV~VI. In Chapter VII, measurements of rotational temperatures of molecular oxygen have been demonstrated based on the empirical analyses of the O2 spectra without the requirement of highly resolved rotational features using (1) linewidth fitting, (2) linear fitting, and (3) area fitting methods. In the last chapter, the O2 REMPI spectral model has been built up to accomplish the simulation calculations. The temperature information has been determined based on the comparison between experimental results and REMPI spectral simulations. The O2 REMPI spectral model has been first reported in the community as a demonstration for the rotational temperature measurement of molecular oxygen with a wide temperature measuring range.

Subjects/Keywords: Multiphoton Ionization; Methyl radical; Quantitative measurement; Temperature; O2 rotational structure; Aerodynamics and Fluid Mechanics; Atomic, Molecular and Optical Physics; Heat Transfer, Combustion; Optics

…119 O2 Structure and REMPI Scheme… …rotational temperature determination by empirical equations for O2 and ambient air, respectively… …111 Figure 41. (Color online) O2 rotational temperature empirical equation… …Color online) Selected O2 rotational spectra used in the area fitting method… …detailed structures of atoms or molecules. For example rotational structure of molecular oxygen… 

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Wu, Y. (2015). Measurements of Methyl Radicals and Temperatures by using Coherent Microwave Rayleigh Scattering from Resonance Enhanced Multiphoton Ionization. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/3484

Chicago Manual of Style (16th Edition):

Wu, Yue. “Measurements of Methyl Radicals and Temperatures by using Coherent Microwave Rayleigh Scattering from Resonance Enhanced Multiphoton Ionization.” 2015. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed January 21, 2019. https://trace.tennessee.edu/utk_graddiss/3484.

MLA Handbook (7th Edition):

Wu, Yue. “Measurements of Methyl Radicals and Temperatures by using Coherent Microwave Rayleigh Scattering from Resonance Enhanced Multiphoton Ionization.” 2015. Web. 21 Jan 2019.

Vancouver:

Wu Y. Measurements of Methyl Radicals and Temperatures by using Coherent Microwave Rayleigh Scattering from Resonance Enhanced Multiphoton Ionization. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2015. [cited 2019 Jan 21]. Available from: https://trace.tennessee.edu/utk_graddiss/3484.

Council of Science Editors:

Wu Y. Measurements of Methyl Radicals and Temperatures by using Coherent Microwave Rayleigh Scattering from Resonance Enhanced Multiphoton Ionization. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2015. Available from: https://trace.tennessee.edu/utk_graddiss/3484

.