Título: | TURBULENT NONPREMIXED ETHANOL-AIR FLAME EXPERIMENTAL STUDY USING LASER DIAGNOSTICS | ||||||||||||||||||||||||||||||||||||
Autor: |
JULIO CESAR EGUSQUIZA GONI |
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Colaborador(es): |
LUIS FERNANDO FIGUEIRA DA SILVA - Orientador |
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Catalogação: | 05/NOV/2021 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||||||||||||||||||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=55675&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=55675&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.55675 | ||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||
A turbulent nonpremixed ethanol spray flame is characterized through
experiments using laser diagnostics. The spray burner has been designed to
generate a stable flame with the use of a bluff body. The experiments include
spatially-resolved measurements of visualization of droplets distribution (Mie
scattering), OH fluorescence intensity, which indicates the reaction zone (Planar
laser-induced fluorescence, PLIF) and mean air-flow velocity (Particle imaging
velocimetry, PIV). Initially, water sprays results are compared corresponding to
different flow rates, showing two asymmetric maximum intensity zones of Mie
scattering, which are found near the nozzle at jet velocities. For low flow
velocity, coalescence of droplets occurs in the central zone. Then two
combustion regimes have been studied, using OH PLIF that corresponds to two
different fuel flow rates. The instantaneous and average structure of turbulent
flames, allowed identifying local extinction regions. Combined Mie
scattering/PLIF results allowed determining, in the case of smallest fuel flow
rates, that the spray is surrounded by the flame, which represents a classical
situation for the development of combustion models for turbulent flames. In the
case of larger flow rate, discrepancies from the classical behavior were observed,
since droplets interact strongly with the combustion process.
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