Laser-induced ignition of methane-air mixtures by a four-beam, pulse-burst mode passively Q-switched Nd:YAG/Cr4+:YAG laser
Results in Physics（2022）
Abstract
•Multiple-point, pulse-burst mode laser ignition (LI) of CH4-air was investigated in a static combustion chamber using a purposely-built compact Nd:YAG/Cr4+:YAG laser.•Multiple-point LI leads to an acceleration of the flame speed in the early kernel development phase.•Multiple-point LI leads to an improvement of combustion efficiency near the lean limit.•Raising initial combustion chamber pressure leads to unexpected behavior in multiple-point LI.
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Key words
Diode-pumped solid-state lasers,Nd:YAG lasers,Passively Q-switched lasers,Laser ignition,Methane-air mixtures
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