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Title: Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO 2 addition

Authors:
; ; ; ; ORCiD logo;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1415300
Grant/Contract Number:
FE0011822; FG02-03ER15391
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Combustion and Flame
Additional Journal Information:
Journal Volume: 181; Journal Issue: C; Related Information: CHORUS Timestamp: 2018-01-02 04:27:42; Journal ID: ISSN 0010-2180
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Han, Dong, Satija, Aman, Kim, Jupyoung, Weng, Yifan, Gore, Jay P., and Lucht, Robert P. Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO 2 addition. United States: N. p., 2017. Web. doi:10.1016/j.combustflame.2017.03.027.
Han, Dong, Satija, Aman, Kim, Jupyoung, Weng, Yifan, Gore, Jay P., & Lucht, Robert P. Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO 2 addition. United States. doi:10.1016/j.combustflame.2017.03.027.
Han, Dong, Satija, Aman, Kim, Jupyoung, Weng, Yifan, Gore, Jay P., and Lucht, Robert P. 2017. "Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO 2 addition". United States. doi:10.1016/j.combustflame.2017.03.027.
@article{osti_1415300,
title = {Dual-pump vibrational CARS measurements of temperature and species concentrations in turbulent premixed flames with CO 2 addition},
author = {Han, Dong and Satija, Aman and Kim, Jupyoung and Weng, Yifan and Gore, Jay P. and Lucht, Robert P.},
abstractNote = {},
doi = {10.1016/j.combustflame.2017.03.027},
journal = {Combustion and Flame},
number = C,
volume = 181,
place = {United States},
year = 2017,
month = 7
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 20, 2018
Publisher's Accepted Manuscript

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  • Dual-pump coherent anti-Stokes Raman scattering (CARS) is used to measure temperature and species profiles in representative non-premixed and partially-premixed CH{sub 4}/O{sub 2}/N{sub 2} flames. A new laser system has been developed to generate a tunable single-frequency beam for the second pump beam in the dual-pump N{sub 2}-CO{sub 2} CARS process. The second harmonic output ({proportional_to}532 nm) from an injection-seeded Nd:YAG laser is used as one of the narrowband pump beams. The second single-longitudinal-mode pump beam centered near 561 nm is generated using an injection-seeded optical parametric oscillator, consisting of two non-linear {beta}-BBO crystals, pumped using the third harmonic output ({proportional_to}355more » nm) of the same Nd:YAG laser. A broadband dye laser (BBDL), pumped using the second harmonic output of an unseeded Nd:YAG laser, is employed to produce the Stokes beam centered near 607 nm with full-width-at-half-maximum of {proportional_to}250 cm{sup -1}. The three beams are focused between two opposing nozzles of a counter-flow burner facility to measure temperature and major species concentrations in a variety of CH{sub 4}/O{sub 2}/N{sub 2} non-premixed and partially-premixed flames stabilized at a global strain rate of 20 s{sup -1} at atmospheric-pressure. For the non-premixed flames, excellent agreement is observed between the measured profiles of temperature and CO{sub 2}/N{sub 2} concentration ratios with those calculated using an opposed-flow flame code with detailed chemistry and molecular transport submodels. For partially-premixed flames, with the rich side premixing level beyond the stable premixed flame limit, the calculations overestimate the distance between the premixed and the non-premixed flamefronts. Consequently, the calculated temperatures near the rich, premixed flame are higher than those measured. Accurate prediction of the distance between the premixed and the non-premixed flames provides an interesting challenge for future computations. (author)« less
  • Simultaneous temperature and N/sub 2/-concentration data have been obtained employing a 10-Hz coherent anti-stokes Raman spectroscopy system on two propane-air turbulent-jet diffusion flames with Reynolds numbers of 2000 and 6000. Average values, probability density functions, and correlation plots show reasonable trends for both centerline and radial profiles of the turbulent flames.
  • In-situ wide-angle X-ray scattering (WAXS) measurements have been conducted on atmospheric-pressure fuel-rich premixed freely propagating ethylene/oxygen flames with argon and nitrogen dilution. In this work, a novel analysis methodology able to provide quantitative information on soot/carbon particle species and concentrations was tested under heavy sooting conditions. The particle composition and concentrations were retrieved by fitting theoretical calculations of structural components from major molecular and nanometric species to the experimental WAXS data. The results show that argon dilution yields predominantly graphenelike components that are less stacked and amorphous carbon that is less structured than under nitrogen dilution. This finding was latermore » confirmed by electron microscopy analysis on samples extracted from similar flames. In addition, the WAXS showed that most of the carbon present in the flames was bound as particles. These results constitute some of the first in-situ observations on structures and concentrations of carbon species in laboratory burner flames operating without stabilization plates.« less
  • Simultaneous temperature and N2-concentration data have been obtained employing a 10-Hz CARS system on two propane-air turbulent-jet diffusion flames with Reynolds numbers of 2000 and 6000. Average values, probability density functions, and correlation plots show reasonable trends for both centerline and radial profiles of the turbulent flames.