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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Laser-saturated fluorescence of nitric oxide and chemiluminescence measurements in premixed ethanol flames

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Author(s):
Marques, Carla S. T. [1] ; Barreta, Luiz G. [1] ; Sbampato, Maria E. [1] ; dos Santos, Alberto M. [1]
Total Authors: 4
Affiliation:
[1] Inst Adv Studies Gen Command Aerospatial Technol, Aerothermodynam & Hyperson Div, BR-12228001 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: EXPERIMENTAL THERMAL AND FLUID SCIENCE; v. 34, n. 8, p. 1142-1150, NOV 2010.
Web of Science Citations: 7
Abstract

In this study, nitric oxide laser-saturated fluorescence (LSF) measurements were acquired from premixed ethanol flames at atmospheric pressure in a burner. NO-LSF experimental profiles for fuel-rich premixed ethanol flames (Phi = 1.34 and Phi = 1.66) were determined through the excitation/detection scheme of the Q(2)(26.5) rotational line in the A(2)Sigma(+) - X(2)II (0, 0) vibronic band and gamma(0, 1) emission band. A calibration procedure by NO doping into the flame was applied to establish the NO concentration profiles in these flames. Chemiluminescent emission measurements in the (0, 0) vibronic emission bands of the OH(+) (A(2)Sigma(+)- X(2)II) and CH(+) (A Delta - X(2)II) radicals were also obtained with high spatial and spectral resolution for fuel-rich premixed ethanol flames to correlate them with NO concentrations. Experimental chemiluminescence profiles and the ratios of the integrated areas under emission spectra (A(CH center dot)/A(CH center dot)(max.) and A(CH center dot)/A(OH center dot)) were determined. The relationships between chemiluminescence and NO concentrations were established along the premixed ethanol flames. There was a strong connection between CH(+) radical chemiluminescence and NO formation and the prompt-NO was identified as the governing mechanism for NO production. The results suggest the optimum ratio of the chemiluminescence of two radicals (A(CH center dot)/A(OH center dot)) for NO diagnostic purposes. (C) 2010 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 05/00505-9 - Chemiluminescence and NOx concentration study in ethanol flames
Grantee:Carla Simone Tafuri Marques
Support Opportunities: Regular Research Grants