Modeling of Plasma-Induced Ignition and Combustion

2008 ◽  
Author(s):  
Iain D. Boyd ◽  
Michael Keidar
Keyword(s):  
Induced Ignition ◽  
Ignition And Combustion

scholarly journals Explosion-induced ignition and combustion of acetylene clouds

Shock Waves ◽  
2018 ◽  
Vol 28 (5) ◽  
pp. 1031-1037
Author(s):  
A. L. Kuhl ◽  
H. Reichenbach ◽  
J. B. Bell ◽  
V. E. Beckner
Keyword(s):  
Induced Ignition ◽  
Ignition And Combustion

Review of Laser Ignition for Methane-Air Mixtures

2015 ◽  
Vol 727-728 ◽  
pp. 592-596
Author(s):  
Hong Tao Wang ◽  
Cang Su Xu
Keyword(s):  
Fuel Consumption ◽  
Internal Combustion Engines ◽  
Pollutant Emissions ◽  
Laser Ignition ◽  
Combustion Engines ◽  
Ignition System ◽  
Spark Plug ◽  
Induced Ignition ◽  
Ignition And Combustion ◽  
Promising Development

Reducing vehicle pollutant emissions and fuel consumption is becoming more and more important challenges, while lean-burning are a promising development. However, lean-burning may leads to other problems including combustion instability and incomplete combustion. Recently, laser ignition system has become an attractive field of research in order to replace the conventional spark plug ignition systems in the internal combustion engines to solve problem above. Moreover, methane was regarded as very promising fuel. Therefore, the objective of this article is to review the ignition and combustion characteristics of methane-air mixtures by laser-induced ignition.

scholarly journals Laser-Induced Ignition and Combustion of Individual Aluminum Particles Below 10 μm by Microscopic High-Speed Cinematography

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 280 ◽  
Author(s):  
Fengting Hou ◽  
Shengji Li ◽  
Yue Wang ◽  
Xuefeng Huang
Keyword(s):  
Direct Observation ◽  
High Speed ◽  
Combustion Mechanism ◽  
Aluminum Particles ◽  
Experimental Apparatus ◽  
High Speed Cinematography ◽  
Metal Aluminum ◽  
Induced Ignition ◽  
Combustion Behaviors ◽  
Ignition And Combustion

Metal aluminum has been widely used as an ingredient in propellant, gunpowder and thermite, but there is less understanding of the combustion mechanism of aluminum particles from submicron to several microns in diameter. This paper proposes to experimentally investigate the ignition and combustion characteristics of individual aluminum particles below 10 μm. A specific in situ diagnostic experimental apparatus was first designed for directly observing the ignition and combustion behaviors of individual aluminum particles, with a submicrometer spatial resolution and a temporal resolution of tens of microseconds. Direct observation through microscopic high-speed cinematography demonstrated that, when heated by a continuous laser, individual aluminum particles thermally expanded, followed by shell rupture; the molten aluminum core overflowed and evaporated, leading to ignition and combustion. Further results showed that, when the laser power densities were gradually increased (5.88, 7.56 and 8.81 × 105 W/cm2), the durations of thermal expansion, melting and evaporation were shortened. The required time for the aluminum particles to expand to 150% of their initial diameter was shortened (34 s, 0.34 s and 0.0125 s, respectively). This study will be beneficial to further extend the investigation of other individual metal particles and reveal their combustion mechanism by direct observation.

Laser‐Induced Ignition and Combustion of Al−Mg Alloy Powder Prepared by Melt Atomization

2020 ◽  
Vol 45 (10) ◽  
pp. 1645-1653
Author(s):  
Xuefeng Huang ◽  
Yihang Yang ◽  
Fengting Hou ◽  
Shengji Li ◽  
Zhao Qin ◽  
...  
Keyword(s):  
Alloy Powder ◽  
Mg Alloy ◽  
Induced Ignition ◽  
Ignition And Combustion

Laser-induced ignition and combustion in a SI engine with direct injection

MTZ worldwide ◽  
2010 ◽  
Vol 71 (7-8) ◽  
pp. 62-69
Author(s):  
Volker Gross ◽  
Heiko Kubach ◽  
Ulrich Spicher ◽  
Robert Schiessl ◽  
Ulrich Maas
Keyword(s):  
Direct Injection ◽  
Si Engine ◽  
Induced Ignition ◽  
Ignition And Combustion

scholarly journals Laser-Induced Ignition and Combustion Behavior of Individual Graphite Microparticles in a Micro-Combustor

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1493
Author(s):  
Yue Wang ◽  
Minqi Zhang ◽  
Shuhang Chang ◽  
Shengji Li ◽  
Xuefeng Huang
Keyword(s):  
Focal Point ◽  
Flame Structure ◽  
Particle Diameter ◽  
Atmospheric Temperature ◽  
Combustion Behavior ◽  
Flame Instability ◽  
Induced Ignition ◽  
Ignition And Combustion ◽  
The Individual ◽  
Micro Combustor

Microscale combustion has potential application in a micro power generator. This paper studied the ignition and combustion behavior of individual graphite microparticles in a micro-combustor to explore the utilization of carbon-based fuels at the microscale system. The individual graphite microparticles inside the micro-combustor were ignited by a highly focused laser in an air flow with natural convection at atmospheric temperature and pressure. The results show that the ignition of graphite microparticles was heterogeneous. The particle diameter had a small weak effect on ignition delay time and threshold ignition energy. The micro-combustor wall heat losses had significant effects on the ignition and combustion. During combustion, flame instability, photophoresis, repetitive extinction and reignition were identified. The flame structure was asymmetric, and the fluctuation of flame front and radiation intensity showed combustion instability. Photophoretic force pushed the graphite away from the focal point and resulted in extinction. Owing to large wall heat loss, the flame quickly extinguished. However, the graphite was inductively reignited by laser.

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