| Texto completo | |
| Autor(es): |
Marques, Carla S. T.
[1]
;
Barreta, Luiz G.
[1]
;
Sbampato, Maria E.
[1]
;
dos Santos, Alberto M.
[1]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Inst Adv Studies Gen Command Aerospatial Technol, Aerothermodynam & Hyperson Div, BR-12228001 Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | EXPERIMENTAL THERMAL AND FLUID SCIENCE; v. 34, n. 8, p. 1142-1150, NOV 2010. |
| Citações Web of Science: | 7 |
| Assunto(s): | Quimiluminescência |
| Resumo | |
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) | |
| Processo FAPESP: | 05/00505-9 - Estudo das espécies quimiluminescentes e da concentração de NOx em chamas de etanol |
| Beneficiário: | Carla Simone Tafuri Marques |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |