Investigation of combustion instability of propane fuel enriched with oxygen under acoustic enforcement

Mutlu K., Taştan M.

PETROLEUM SCIENCE AND TECHNOLOGY, vol.42, no.1, pp.37-55, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 42 Issue: 1
  • Publication Date: 2023
  • Doi Number: 10.1080/10916466.2023.2191639
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Chemical Abstracts Core, Communication Abstracts, Compendex, Environment Index, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.37-55
  • Keywords: acoustic enforcement, combustion instability, emissions, oxygen enrichment, propane flame
  • Erciyes University Affiliated: Yes


One method for reducing flue gas emissions is oxygen enrichment combustion. In this study, propane has been used as a fuel. The oxygen-enriched combustion study was carried out by increasing the oxygen ratio in the air used for combustion. Experiments have been performed at a constant equivalence ratio (1.2) and the number of swirl (s = 1) at 7 kW thermal power. Combustion has been performed under different oxygen ratios of 21%, 24%, 27%, and 28%, respectively. During combustion, acoustic enforcement has been carried out on the propane flame by utilizing loudspeakers, and so flame instability has been observed by changing enforcement levels and investigating dynamic pressure, luminous intensity, and flame images. The acoustic resonance of the combustion chamber was determined by basing abrupt changing dynamic pressure on 110, 175, and 330 Hz. The flue gas emission value and temperature effect of oxygen-enriched combustion were investigated under different acoustic excitations. Dynamic pressure and luminous intensity went up with oxygen enrichment. CO emission decreased about 97%, and adiabatic flame temperature increased, and NOx emissions increased about 2.5 times as the oxygen ratio increased. The flame length reduced under acoustic enforcement. The flue gas emissions decreased at all acoustic enforcement levels, especially at 110 Hz. As a result of acoustic enforcement, flame instability was reduced and the flame burned strongly.