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VGU RESEARCH REPOSITORY


Please use this identifier to cite or link to this item: https://epub.vgu.edu.vn/handle/dlibvgu/20
Title: Numerical and experimental study of the influence of CO2 dilution on burning characteristics of syngas/air flame
Authors: Manh Vu Tran 
Gianfranco Scribano 
Cheng Tung Chong 
Jo-Han Ng 
Ho Xuan Thinh 
Keywords: CO2 dilution;Explosion;Numerical simulation;Rate of pressure rise;Syngas
Issue Date: 2019
Publisher: Elsevier
Journal/Book titles: Journal of the Energy Institute 
Series/Report no.: Vol.92 (5);1379-1387
Abstract: 
In this study, effect of carbon dioxide dilution on explosive behavior of syngas/air mixture was investigated numerically and experimentally. Explosion in a 3-D cylindrical geometry model with dimensions identical to the chamber used in the experiment was simulated using ANSYS Fluent. The simulated results showed that after ignition, the flame front propagated outward spherically until it touched the wall, like the propagating flame observed in the experiment. Both experimental and simulated results presented a same trend of decreasing the maximum explosion pressure and prolonging the explosion time with CO2 dilution. The results showed that for CO2 additions, the maximum explosion pressure decreased linearly and the explosion time increased linearly, while the maximum rate of pressure rise decreased nonlinearly, which can be correlated to an exponential equation. In addition, both results showed a good agreement for syngas/air flame with CO2 addition up to 20% in volume. However, larger discrepancies were observed for higher levels of CO2 dilutions. Of the three diluents tested, carbon dioxide displayed the strongest effect in reducing explosion hazard of syngas/air flame compared to helium and nitrogen. Chemical kinetic analysis results showed that maximum concentration of major radicals and net reaction rates of important reactions drastically decreased with CO2 addition, causing a reduction of laminar flame speed.
Index & Ranking: ISI (SCIE) Q1
URI(1): http://epub.vgu.edu.vn/handle/dlibvgu/20
DOI: 10.1016/j.joei.2018.09.004
Appears in Collections:ARTICLE/BOOK PUBLICATION

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