903 The unstable behavior of premixed flames and increase in flame velocity induced by intrinsic instability

2001 ◽  
Vol 2001 (0) ◽  
pp. 115
Author(s):  
Satoshi Kadowaki
Keyword(s):  
Premixed Flames ◽  
Flame Velocity ◽  
Unstable Behavior

Blowout Characteristics of Partially Premixed Flames of Prevaporized Blends of Biofuels and Petroleum Fuels

2017 ◽  
Author(s):  
Tonci Maleta ◽  
Ramkumar N. Parthasarathy ◽  
Subramanya R. Gollahalli
Keyword(s):  
Laminar Flame ◽  
Flame Temperature ◽  
Premixed Flames ◽  
Temperature Profiles ◽  
Flame Velocity ◽  
Gas Phase Reactions ◽  
Partially Premixed Flames ◽  
Inner Diameter ◽  
Partially Premixed ◽  
Petroleum Fuels

The laminar partially premixed flames of prevaporized Jet-A, canola methyl ester (CME) and blend flames of Jet-A and CME were studied over a range of equivalence ratios of 0.6–0.8 with and without heated coflow. Measurements of blowout velocities and flame temperature profiles were made. The injector was designed to produce a uniform inner flow and had an inner diameter of 12.7 mm. The flames were laminar and blue in color (dominated by homogeneous gas-phase reactions). The temperature profiles in all the flames were similar, with a peak temperature of 1680 K. The blowout velocity increased with equivalence ratio for all the flames; the blowout velocity of pure CME flames was higher than that of pure Jet-A flames with no coflow present. The blowout velocity of the blend flames ranged around the values for the pure fuel flames. A Damkohler number (based on the velocity gradient at the jet boundary and chemical reaction time scale estimated from laminar flame velocity) of unity characterizes the blowout velocity. As the coflow velocity was increased, the blowout velocity was increased, and the differences between the values for the various flames became smaller.

scholarly journals Buoyant Unstable Behavior of Initially Spherical Lean Hydrogen-Air Premixed Flames

Energies ◽  
2014 ◽  
Vol 7 (8) ◽  
pp. 4938-4956 ◽  
Author(s):  
Zuo-Yu Sun ◽  
Guo-Xiu Li ◽  
Hong-Meng Li ◽  
Yue Zhai ◽  
Zi-Hang Zhou
Keyword(s):  
Premixed Flames ◽  
Unstable Behavior

The unstable behavior of cellular premixed flames induced by intrinsic instability

2005 ◽  
Vol 30 (1) ◽  
pp. 169-176 ◽  
Author(s):  
Satoshi Kadowaki ◽  
Hiroshi Suzuki ◽  
Hideaki Kobayashi
Keyword(s):  
Premixed Flames ◽  
Unstable Behavior

scholarly journals Unstable behavior of hydrogen-air lean premixed flames (Effects of unburned-gas temperature, heat loss and scale)

2020 ◽  
Vol 86 (883) ◽  
pp. 19-00401-19-00401
Author(s):  
Satoshi KADOWAKI ◽  
Tsutomu UCHIYAMA ◽  
Toshiyuki KATSUMI ◽  
Thwe Thwe Aung ◽  
Hideaki KOBAYASHI
Keyword(s):  
Heat Loss ◽  
Premixed Flames ◽  
Gas Temperature ◽  
Unstable Behavior ◽  
Lean Premixed Flames ◽  
Temperature Heat ◽  
Lean Premixed
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