Effects of electric fields on the flame propagation velocity of methane-air flame

AIAA Journal ◽  
1986 ◽  
Vol 24 (1) ◽  
pp. 190-192 ◽  
Author(s):  
R.I. Noorani ◽  
R.E. Holmes
Keyword(s):  
Electric Fields ◽  
Flame Propagation ◽  
Propagation Velocity ◽  
Flame Propagation Velocity

Flame Propagation Velocity for Co-combustion of Pulverized Coals and Gas Fuels

2021 ◽  
Vol 35 (7) ◽  
pp. 6305-6314
Author(s):  
Masayuki Taniguchi
Keyword(s):  
Flame Propagation ◽  
Propagation Velocity ◽  
Flame Propagation Velocity

scholarly journals Flame propagation velocity in 2-stage gas combustion system applied in SI engine

2018 ◽  
Vol 421 ◽  
pp. 042009
Author(s):  
W Bueschke ◽  
M Skowron ◽  
F Szwajca ◽  
K Wisłocki
Keyword(s):  
Flame Propagation ◽  
Propagation Velocity ◽  
Combustion System ◽  
Si Engine ◽  
Gas Combustion ◽  
Flame Propagation Velocity

scholarly journals Effects of Flame Propagation Velocity and Turbulence Intensity on End-Gas Auto-Ignition in a Spark Ignition Gasoline Engine

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5039
Author(s):  
Lei Zhou ◽  
Xiaojun Zhang ◽  
Lijia Zhong ◽  
Jie Yu
Keyword(s):  
Flame Propagation ◽  
Turbulence Intensity ◽  
Propagation Velocity ◽  
Gasoline Engine ◽  
Pressure Oscillation ◽  
Spark Ignition ◽  
Flame Propagation Velocity ◽  
Eddy Simulation ◽  
Auto Ignition ◽  
Large Eddy

Knocking is a destructive and abnormal combustion phenomenon that hinders modern spark ignition (SI) engine technologies. However, the in-depth mechanism of a single-factor influence on knocking has not been well studied. Thus, the major aim of the present study is to study the effects of flame propagation velocity and turbulence intensity on end-gas auto-ignition through a large eddy simulation (LES) and a decoupling methodology in a downsized gasoline engine. The mechanisms of end-gas auto-ignition as well as strong pressure oscillation are qualitatively analyzed. It is observed that both flame propagation velocity and turbulence have a non-monotonic effect on knocking intensity. The competitive relationship between flame propagation velocity and ignition delay of the end gas is the primary reason responding to this phenomenon. A higher flame speed leads to an increase in the heat release rate in the cylinder, and consequently, quicker increases in the temperature and pressure of the unburned end-gas mixture are obtained, leading to end-gas auto-ignition. Further, the coupling of a pressure wave and an auto-ignition flame front results in super-knocking with a maximum peak of pressure of 31 MPa. Although the turbulence indirectly influences the end-gas auto-ignition by affecting the flame propagation velocity, it can accelerate the dissipation of radicals and heat in the end gas, which significantly influences knocking intensity. Moreover, it is found that the effect of turbulence is more pronounced than that of flame propagation velocity in inhibiting knocking. It can be concluded that the intensity of the pressure oscillation depends on the unburned mixture mass as well as the local thermodynamic state induced by flame propagation and turbulence, with mutual interactions. The present work is expected to provide valuable perspective for inhibiting super-knocking of an SI gasoline engine.

Model To Evaluate Flame Propagation Velocity for Pulverized Coal Particles

2013 ◽  
Vol 27 (3) ◽  
pp. 1661-1667
Author(s):  
Masayuki Taniguchi
Keyword(s):  
Flame Propagation ◽  
Propagation Velocity ◽  
Pulverized Coal ◽  
Flame Propagation Velocity ◽  
Coal Particles

Methodologies for Flame Propagation Velocity Determination in Spark Ignited Engines

2017 ◽  
Author(s):  
Guilherme Bastos Machado ◽  
José Eduardo Mautone Barros ◽  
Sérgio Leal Braga ◽  
Carlos Valois Maciel Braga
Keyword(s):  
Flame Propagation ◽  
Propagation Velocity ◽  
Flame Propagation Velocity

Critical combustion conditions and flame propagation velocity along plane polymethyl methacrylate layers

1981 ◽  
Vol 17 (2) ◽  
pp. 185-188
Author(s):  
L. I. Aldabaev ◽  
N. N. Bakhman ◽  
B. N. Kondrikov ◽  
L. A. Shutova
Keyword(s):  
Polymethyl Methacrylate ◽  
Flame Propagation ◽  
Propagation Velocity ◽  
Flame Propagation Velocity ◽  
Critical Combustion
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