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Pressure dependence of combustion instability for premixed syngas/air in a closed channel.
- Source :
-
International Journal of Hydrogen Energy . Oct2022, Vol. 47 Issue 83, p35171-35183. 13p. - Publication Year :
- 2022
-
Abstract
- Syngas is a promising alternative energy carrier with low carbon and pollutants emissions, which has huge application potential in internal combustion engines and gas turbines. The combustion characteristics of stoichiometric syngas/air mixtures with varied initial pressure (0.5–2.5 atm) and hydrogen content (10%–90% v/v) were examined through experiments in a rectangular closed channel. The flame images and overpressure dynamics were captured by high-speed schlieren photography and pressure sensors. The flame instabilities and the flame-acoustic wave interaction were explored. The results showed that the flame morphology and dynamics were enhanced with increasing hydrogen content and initial pressure. The Darrius-Landau instability has an impact on flame deformation, which was strengthened with growing initial pressure, while the thermo-diffusive instability could be neglected during combustion. At later stages after tulip inversion, the flame-acoustic wave interaction was relatively outstanding inducing wrinkled flame front and cellular structures on the flame surface. • Resonance made the flame evolution different at varied initial pressures. • The hydrogen content had greater impact on flame deformation than initial pressure. • Acoustic effects were outstanding in later stages of flame propagation. • Flame-acoustic wave interaction caused cellular structure on the flame surface. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 47
- Issue :
- 83
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 159569486
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2022.07.109