Measurements and modeling of PAH soot precursors in coflow ethylene/air laminar diffusion flames
| Autor: | Andrés Fuentes, R. Demarco, Alejandro Jerez, J.J. Cruz Villanueva, L. F. Figueira da Silva |
|---|---|
| Přispěvatelé: | Universidad Tecnica Federico Santa Maria [Valparaiso] (UTFSM), Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Institut Pprime (PPRIME), ENSMA-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Laser-induced incandescence 020209 energy General Chemical Engineering [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment Organic Chemistry Analytical chemistry Energy Engineering and Power Technology MESH: Laminar flame PAH Laser Induced Fluorescence Laser InducedIncandescence Soot pyrometry Laminar flow 02 engineering and technology medicine.disease_cause Soot law.invention Fuel Technology 020401 chemical engineering Thermal radiation law Planar laser-induced fluorescence Volume fraction 0202 electrical engineering electronic engineering information engineering medicine 0204 chemical engineering Diffusion (business) Pyrometer |
| Zdroj: | Fuel Fuel, Elsevier, 2019, 236, pp.452-460. ⟨10.1016/j.fuel.2018.09.047⟩ |
| ISSN: | 0016-2361 1873-7153 |
| DOI: | 10.1016/j.fuel.2018.09.047⟩ |
| Popis: | International audience; New experimental and numerical results of a laminar ethylene-air co-flow non-premixed flame are compared, in terms of soot volume fraction and temperature, and of polycyclic aromatic hydrocarbons (PAH) distributions. Measurements involved UV-excited laser induced incandescence (properly calibrated), planar laser induced fluorescence (PLIF),and deconvoluted two-color pyrometry. In order to evidence soot and PAH, the comparison of prompt and delayed detection is carried out at four spectral detection wavelengths(340, 400, 450 and 550 nm). Numerical results are obtained using a detailed gas-phase chemical kinetics mechanism considering 94 species and 719 reactions, and a sectional soot model, together with a statistical narrow band correlated K (SNBCK) wide band model to account for radiation. Computed PAH, grouped by their number of rings, is found to exhibit a good correlation with experimental PLIF results at different spectral detection wavelengths. In particular, it is shown that 340 and 400 nm fluorescence signals indicate the presence of one up to four-ringed computed PAH, whereas the interpretation of measurements at larger wavelengths is found to be elusive, due to soot signal overlap. Furthermore, an interplay between temperature decrease, soot volume fraction increase and radiative heat transfer distribution with increasing fuel flow rate is also demonstrated |
| Databáze: | OpenAIRE |
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