Relationship between the smallest scale of flame wrinkles and turbulence characteristics of high-pressure, high-temperature turbulent premixed flames

2002 ◽  
Vol 29 (2) ◽  
pp. 1793-1800 ◽  
Author(s):  
Hideaki Kobayashi ◽  
Takuya Kawahata ◽  
Katsuhiro Seyama ◽  
Toshiro Fujimari ◽  
Jong-Soo Kim
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Premixed Flames ◽  
Turbulent Premixed Flames ◽  
Turbulence Characteristics ◽  
High Pressure High Temperature ◽  
Turbulent Premixed

Effects of CO2 dilution on turbulent premixed flames at high pressure and high temperature

2007 ◽  
Vol 31 (1) ◽  
pp. 1451-1458 ◽  
Author(s):  
Hideaki Kobayashi ◽  
Hirokazu Hagiwara ◽  
Hideaki Kaneko ◽  
Yasuhiro Ogami
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Premixed Flames ◽  
Turbulent Premixed Flames ◽  
Turbulent Premixed

Flame front characteristics of turbulent premixed flames diluted with CO2 and H2O at high pressure and high temperature

2013 ◽  
Vol 34 (1) ◽  
pp. 1429-1436 ◽  
Author(s):  
Jinhua Wang ◽  
Futoshi Matsuno ◽  
Masaki Okuyama ◽  
Yasuhiro Ogami ◽  
Hideaki Kobayashi ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Flame Front ◽  
Premixed Flames ◽  
Turbulent Premixed Flames ◽  
Turbulent Premixed

E112 Flame Structure of CO/H_2/C_2/air Turbulent Premixed Flames in a High Pressure Environment

2010 ◽  
Vol 2010 (0) ◽  
pp. 121-122
Author(s):  
Hideaki kobayashi ◽  
Yasuhisa Ichikawa ◽  
Yuki Otawara ◽  
Yasuhiro Ogami ◽  
Taku Kudo ◽  
...  
Keyword(s):  
High Pressure ◽  
Flame Structure ◽  
Premixed Flames ◽  
Turbulent Premixed Flames ◽  
High Pressure Environment ◽  
Turbulent Premixed

High-Pressure Combustion Phenomena

2007 ◽  
Author(s):  
Hideaki Kobayashi
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Flame Spread ◽  
Burning Velocity ◽  
Premixed Flames ◽  
Spread Rate ◽  
Flame Spread Rate ◽  
Droplet Array ◽  
Turbulent Burning Velocity ◽  
Turbulent Premixed

Two high-pressure combustion phenomena recently observed by the author’s group are reviewed. The first one is the flame spread of a droplet array in the supercritical pressure range of the fuel in microgravity. Microgravity experiments are essential for research on droplet combustion, especially at high pressure, because of the large Grashof number in normal gravity. The flame spread rate for an n-decane droplet array was measured at high pressure, and a fuel-vapor jet was found to be generated due to an imbalance of surface tension of the droplet surface, leading to a higher flame spread rate. The second phenomenon is turbulent premixed combustion at high pressure and high temperature, environmental conditions of which are very close to those in SI engines and premixed-type gas turbine combustors. Information on the flame characteristics in such conditions has been very limited. A high-pressure combustion test facility with a large high-pressure combustion chamber enabled us to stabilize turbulent premixed flames with a high turbulence Reynolds number and to perform flame observations and measurements for extended period using lasers. Turbulent burning velocity was successfully measured and significant effects of intrinsic flame instability on flame structure and turbulent burning velocity at high pressure were revealed. Effects of CO2 dilution on high-pressure and high-temperature premixed flames were also investigated to evaluate the fundamental effects of exhaust gas recirculation (EGR) in practical high-load high-pressure combustors.

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