Experimental and numerical investigation of explosive behavior of syngas/air mixtures

Manh Vu Tran, Gianfranco Scribano, Cheng Tung Chong, Thinh X. Ho, Thanh Cong Huynh

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)

Abstract

In this study, the explosive behavior of syngas/air mixtures was investigated numerically in a 3-D cylindrical geometric model, using ANSYS Fluent. A chamber with the same dimensions as the geometry in the simulation was used to investigate the explosion process experimentally. The outcome was in good agreement with experimental results for most equivalence ratios at atmospheric pressure, while discrepancies were observed for very rich mixtures (ϕ > 2.0) and at elevated pressure conditions. Both the experimental and simulated results showed that for syngas/air mixture, the maximum explosion pressure increased from lean (ϕ = 0.8) to an equivalence ratio of 1.2, then decreased significantly with richer mixtures, indicating that maximum explosion pressure occurred at the equivalence ratio of 1.2, while explosion time was shortest at an equivalence ratio of 1.6. Increasing H2 content in the fuel blends significantly raised laminar burning velocity and shortened the explosion time, thereby increasing the maximum rate of pressure rise and deflagration index. Normalized peak pressure, the maximum rate of pressure rise and the deflagration index were sensitive to the initial pressure of the mixture, showing that they increased significantly with increased initial pressure.

Original languageEnglish
Pages (from-to)8152-8160
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number16
DOIs
Publication statusPublished - 19 Apr 2018

Keywords

  • Constant volume combustion chamber
  • Explosion
  • Numerical simulation
  • Rate of pressure rise
  • Syngas

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