| Texto completo | |
| Autor(es): |
Mendiburu, Andres Z.
[1]
;
Serra, Jr., Aguinaldo M.
[2]
;
Andrade, Jose C.
[2]
;
Silva, Lucas M.
[3]
;
Santos, Jose C.
[2]
;
de Carvalho, Jr., Joao A.
[3]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Univ Fed Rio Grande do Sul, Dept Mech Engn, R Sarmento Leite 425, BR-90050170 Porto Alegre, RS - Brazil
[2] Natl Space Res Inst INPE, Combust & Prop Lab, Rod Pres Dutra, Km 39, BR-12630000 Cachoeira Paulista, SP - Brazil
[3] Sao Paulo Univ UNESP, Sch Engn, Dept Energy, Ave Ariberto P da Cunha 333, BR-12510410 Guaratingueta, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo de Revisão |
| Fonte: | ENERGY; v. 187, NOV 15 2019. |
| Citações Web of Science: | 1 |
| Resumo | |
Ethanol-air deflagrations were experimentally studied inside a closed tube by varying the equivalence ratio (0.9-1.4) and the initial pressure (20-60 kPa). The flame front inversion phenomenon was observed in all tests. It was determined that the ratio of the distance of flat flame formation to the hydraulic diameter (d(f)/d(h)) is a measurable parameter that allows the characterization of the phenomenon. For ethanol-air mixtures two dimensionless parameters can be used to correlate d(f)/d(h), namely, the ratio of the laminar flame speed to the speed of sound of the reactants (S-L/C-S,C-0) and the dimensionless distance travelled by the flame tip up to the time when the flame touches the lateral walls of the tube (xi(tip,wall)) . Two correlations were obtained and the averages of the absolute values of the relative errors (AARE) were less than 1.2%. Another correlation was obtained considering published data of different fuel-air mixtures. A statistical analysis applied considering experimental data from published literature and from this work, showed an AARE of 8.95% and a coefficient of multiple determination (R-2) of 0.79. The p-values of the regression coefficients were lower than 0.001. Therefore, the correlations present good accuracy and can be used for prediction. (C) 2019 Elsevier Ltd. All rights reserved. (AU) | |
| Processo FAPESP: | 15/25435-5 - Propagação e supressão de chamas de etanol anidro - ar |
| Beneficiário: | João Andrade de Carvalho Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 15/23351-9 - Propagação e supressão de chamas de misturas etanol anidro - ar. |
| Beneficiário: | Andrés Armando Mendiburu Zevallos |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |