Abstract
We have examined the laser extinguishment of a CH4-N2/Air counterflow diffusion flame. Laser extinguishment is to blow off flames by a laser-induced breakdown. A Q-switched Nd: YAG laser (energy; 200mJ/pulse) and a 100-mm focal-length lens were used. The laser-extinguishment probabilities were examined by varying the fuel concentration and the distance from the breakdown point to the flame. As a result, the two concentration limits were clarified. One was the laser extinguishable limit, below which the flame could be extinguished perfectly by laser. The other was the laser inextinguishable limit, over which any flame could not be extinguished. Moreover, it was considered that determination of the laser extinguishable limit was mainly influenced by the laser-induced blast wave. On the other hand, it could be considered that not only the blast wave but also hot gas and turbulence due to the optical breakdown influenced the determination of the laser inextinguishable limit.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
