| Full text | |
| Author(s): |
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]
Total Authors: 6
|
| Affiliation: | [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
Total Affiliations: 3
|
| Document type: | Review article |
| Source: | ENERGY; v. 187, NOV 15 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
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) | |
| FAPESP's process: | 15/25435-5 - FLAME PROPAGATION AND SUPPRESSION OF ANHYDROUS ETHANOL - AIR FLAMES. |
| Grantee: | João Andrade de Carvalho Junior |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 15/23351-9 - FLAME PROPAGATION AND SUPPRESSION OF ANHYDROUS ETHANOL - AIR MIXTURES. |
| Grantee: | Andrés Armando Mendiburu Zevallos |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |