Reference EntryDOI
5 Laser Ignition
TLDR
In this article, the authors proposed a hot gas model for laser-induced gas breakdown and evolution in high-speed and highly turbulent streams, and developed a Diode-Powered solid state laser for laser ignition.Abstract:
The sections in this article are
5.1
Introduction
5.2
Laser Ignition Energy
5.3
Breakdown Threshold Laser Energy
5.3.1
Multiphoton Ionization
5.3.2
Cascade Breakdown Ionization
5.4
Spark Evolution
5.5
Ignition Mechanism
5.5.1
Homogeneous Hot-Gas Model
5.5.2
Blast Wave Ignition Model
5.5.3
A Hot Gas Model
5.6
Potential Applications and Research Needs
5.6.1
Laser-Induced Gas Breakdown and Evolution in High-Speed and Highly Turbulent Streams
5.6.2
Laser Ignition for Stabilization of Ultra-Lean and High Speed Combustion Applications
5.6.3
Laser Ignition under Engine and/or Engine-Like Conditions
5.6.4
Development of a Diode-Pumped Solid State Laser for Laser Ignition Applications
5.7
Conclusions
Keywords:
gas turbine engines;
fuel-lean flame;
jet engines;
laser ignition;
modeling;
spark evolutionread more
References
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Journal ArticleDOI
Laser-induced spark ignition of CH4/air mixtures
Tran X. Phuoc,Fredrick P. White +1 more
TL;DR: In this paper, a laser-induced spark ignition of CH{sub 4}-air mixtures was experimentally investigated using a nanosecond pulse at 1,064 nm from a Q-switched Nd-Yag laser.
Journal ArticleDOI
Laser spark ignition: experimental determination of laser-induced breakdown thresholds of combustion gases
TL;DR: In this paper, the breakdown threshold intensities were measured for the range of pressure from 150 to about 3040 Torr, and the results showed that the pressure dependence of breakdown threshold is I thr ∝ p − n which is in agreement with the inverse bremsstrahlung absorption process creating breakdown.
Journal ArticleDOI
A Radiative Detonation Model for the Development of a Laser-Induced Spark in Air
S. A. Ramsden,P. Savic +1 more
TL;DR: In this paper, it is assumed that after breakdown a shock wave propagates into the undisturbed gas, and that further absorption of energy from the laser beam then occurs behind the shock front travelling towards the lens, in the manner of a detonation wave.
Journal ArticleDOI
Measurements of minimum ignition energy in premixed laminar methane/air flow by using laser induced spark
TL;DR: In this article, the authors investigated the minimum energy necessary to ignite a laminar premixed methane air mixture experimentally using a Q-switched Nd:YAG laser with an anti-reflection-coated lens.
Journal ArticleDOI
Laser spark ignition and combustion characteristics of methane-air mixtures
TL;DR: In this article, a streak camera was used to investigate and record the initial stages of kernel formation in a four-stroke single-cylinder typical high-pressure combustion chamber, where the piston was cycled in the cylinder by using an electric motor driven hydraulic ram.