Spark and flame kernel interaction with dual-pulse laser-induced spark ignition in a lean premixed methaneeair flow
- Authors
- Wermer, Lydia; Lefkowitz, Joseph K.; Ombrello, Timothy; Im, Seong-kyun
- Issue Date
- 15-1월-2021
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Laser ignition; Dual-pulse spark; Flame propagation
- Citation
- ENERGY, v.215
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENERGY
- Volume
- 215
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/50098
- DOI
- 10.1016/j.energy.2020.119162
- ISSN
- 0360-5442
- Abstract
- The growth rate of flame kernels from dual-pulse laser-induced spark (DPLIS) ignition was compared to that from single-pulse laser-induced spark (SPLIS) ignition in a flowing premixed methane-air mixture. The flow speed ranged from 3.75 m/s to 12.5 m/s with equivalence ratios of 0.57-0.67. The pulse energy ranged from 10 mJ to 30 mJ, with each DPLIS pulse having half of the SPLIS pulse energy. High-speed schlieren imaging captured ignition and flame propagation. Two regimes were identified depending on the location of the first laser-induced spark (LIS) kernel: direct interaction and flame combination. The direct interaction regime occurred when the second LIS immediately combined with the first LIS. In the direct interaction regime, DPLIS ignition had faster flame kernel growth rates than SPLIS ignition when the second LIS occurred near the boundary of the first LIS expansion prior to the first LIS igniting the fuel-air mixture. The flame combination regime occurred when each LIS separately ignited the fuel-air mixture and then combined into a single flame kernel. DPLIS ignition had faster flame kernel growth rates in the flame combination regime than did SPLIS ignition when each DPLIS had fully developed into a self-sustaining flame. (C) 2020 Elsevier Ltd. All rights reserved.
- 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.