Dual-pulse laser-induced spark ignition and flame propagation of a methane diffusion jet flame
- Authors
- 임성균
- Issue Date
- 1월-2017
- Publisher
- ELSEVIER SCIENCE INC
- Citation
- PROCEEDINGS OF THE COMBUSTION INSTITUTE, v.36, no.3, pp.4427 - 4434
- Indexed
- SCIE
SCOPUS
- Journal Title
- PROCEEDINGS OF THE COMBUSTION INSTITUTE
- Volume
- 36
- Number
- 3
- Start Page
- 4427
- End Page
- 4434
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/139858
- DOI
- https://doi.org/10.1016/j.proci.2016.07.115
- ISSN
- 1540-7489
- Abstract
- An experimental investigation was performed to study the ignition and flame propagation behaviors of a methane diffusion jet flame (Re = 5500) when dual pulse laser-induced spark discharges were introduced in a mixing layer. Time intervals (dt) of 50 ns, 100 mu s, and 600 mu s between two laser pulses were tested, and the results were compared to a single pulse discharge case with the same total laser energy (60 mJ). The laser-induced breakdown was introduced to the mixing layer at 9.5 jet diameters downstream from the jet exit. The chemical delay time scale under the flow condition was approximately 350 mu s (t(cd)). The disturbances in density fields generated by laser-induced breakdowns and chemical reactions were visualized using a high-speed schlieren imaging technique. The visualization at stationary air showed that interactions between two laser-induced breakdowns increased the surface area of hot plumes, but the effects of the interactions diminished when the breakdowns were introduced in a non-reacting air jet. The effects of the flow on the hot plumes prevailed the interaction effects between two breakdowns in non-reacting air jet condition. However, when the dual pulse laser-induced spark discharges (dt = 600 mu s, dt/t(cd) = 1.71) were generated in a mixing layer of a
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.