Open AccessBreakdown plasma and vortex flow control for laser ignition using a combination of nano- and femto-second lasers
Author(s) -
Hirokazu Kojima,
Eiichi Takahashi,
Hirohide Furutani
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.000a90
Subject(s) - laser , optics , materials science , ignition system , schlieren , laser ignition , femto , femtosecond , sapphire , plasma , physics , quantum mechanics , nuclear physics , thermodynamics
The breakdown plasma and successive flow leading to combustion are controlled by the combination of a nano-second Nd:YAG laser and a femto-second Ti:Sapphire (TiS) laser. The behaviors are captured by an intensified charged coupled device (ICCD) camera and a high-speed schlieren optical system. The TiS laser determines the initial position of the breakdown by supplying the initial electrons in the optical axis of focusing YAG laser pulses. We show that the initial position of the breakdown can be controlled by the incident position of the TiS laser. In addition, the ignition lean limit of the flammable mixture changes depending on the TiS laser incident position, which is influenced by hot gas distribution and the flow in the flame kernel.