CARS thermometry in laminar sooting ethylene-air co-flow diffusion flames with nitrogen dilution

Satija, Aman; Chang, Ziqiao; Lowe, Albyn; Thomas, Levi M.; Masri, Assaad R.; Lucht, Robert P.

doi:10.1016/j.combustflame.2019.06.025

Title: CARS thermometry in laminar sooting ethylene-air co-flow diffusion flames with nitrogen dilution

Journal Article · 09 July 2019 · Combustion and Flame

DOI: https://doi.org/10.1016/j.combustflame.2019.06.025 · OSTI ID:1800065

Satija, Aman ^[1]; Chang, Ziqiao ^[1]; Lowe, Albyn ^[2]; Thomas, Levi M. ^[1]; Masri, Assaad R. ^[2]; Lucht, Robert P. ^[1]

Purdue Univ., West Lafayette, IN (United States)
Univ. of Sydney, NSW (Australia)

Temperature measurements were performed in nonpremixed, sooting jet flames using coherent anti-Stokes Raman scattering (CARS). The jet fluid was ethylene diluted with different concentrations of nitrogen, and the co-flow fluid was dry air. The flames were stabilized on a Yale burner, also known as Smooke/Long burner, and the operating conditions were chosen to match previous experiments on the burner by the Yale group and other research groups. The selected flames have also been identified as target flames by the International Sooting Flame Workshop. CARS measurements of temperature provide insight into the structure of these sooting flames and serve as benchmark data for comparison with computations. A dual-pump vibrational CARS system was used here in order to avoid soot interferences. We were able to obtain high quality CARS spectra in all regions of the flame including the highly sooting regions and near the exit of the fuel nozzle, where the nonresonant modulation of the nitrogen CARS spectrum is strong due to the high ethylene concentrations. The measurements are compared with CFD results in literature and discussed in context of measured soot volume fraction, also, from literature.

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Research Organization:: Purdue Univ., West Lafayette, IN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE

Grant/Contract Number:: FG02-03ER15391

OSTI ID:: 1800065

Alternate ID(s):: OSTI ID: 1532594

Journal Information:: Combustion and Flame, Vol. 208; ISSN 0010-2180

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Title: CARS thermometry in laminar sooting ethylene-air co-flow diffusion flames with nitrogen dilution

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