Abstract

A laser-ignition (LI) method is presented that utilizes a high-repetition-rate (HRR) nanosecond laser to reduce minimal ignition energies of individual pulses by 10 times while maintaining comparable total energies. The most common LI employs a single nanosecond-laser pulse with energies on the order of tens of millijoules to ignite combustible gaseous mixtures. Because of the requirements of high energy per pulse, fiber coupling of traditional LI systems is difficult to implement in real-world systems with limited optical access. The HRR LI method demonstrated here has an order of magnitude lower per-pulse energy requirement than the traditional single-pulse LI technique, potentially allowing delivery through standard commercial optical fibers. Additionally, the HRR LI approach significantly increases the ignition probability of lean combustible mixtures in high-speed flows while maintaining low individual pulse energies.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Laser induced spark ignition of coaxial methane/oxygen/nitrogen diffusion flames

Xiaohui Li, Yang Yu, Xin Yu, Chang Liu, Rongwei Fan, and Deying Chen
Opt. Express 22(3) 3447-3457 (2014)

Investigation of the early stages in laser-induced ignition by Schlieren photography and laser-induced fluorescence spectroscopy

M. Lackner, S. Charareh, F. Winter, K. F. Iskra, D. Rüdisser, T. Neger, H. Kopecek, and E. Wintner
Opt. Express 12(19) 4546-4557 (2004)

Stabilization of a premixed CH4/O2/N2 flame using femtosecond laser-induced plasma

Xin Yu, Jiangbo Peng, Rui Sun, Xiaochuan Yang, Chunhong Wang, Jun Sun, Xiaohui Li, Boyang Jia, Yongpeng Zhao, and Deying Chen
Opt. Lett. 37(11) 2106-2108 (2012)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription