Lifted flame structure of coannular jet flames in a triple port burner

2011 ◽  
Vol 33 (1) ◽  
pp. 1195-1201 ◽  
Author(s):  
Kazuhiro Yamamoto ◽  
Shinya Kato ◽  
Yusuke Isobe ◽  
Naoki Hayashi ◽  
Hiroshi Yamashita
Keyword(s):  
Flame Structure ◽  
Jet Flames ◽  
Lifted Flame

Flame Structure of Attached and Lifted Jet Flames of Low-Calorific-Value Gases

1985 ◽  
Vol 8 (1) ◽  
pp. 43-66 ◽  
Author(s):  
S. R. Gollahalli ◽  
G. K. Zadeh
Keyword(s):  
Flame Structure ◽  
Calorific Value ◽  
Jet Flames

I133 Study on flame structure of co-axial jet flames in High-Temperature Oxygen Combustion conditions

2014 ◽  
Vol 2014 (0) ◽  
pp. _I133-1_-_I133-2_
Author(s):  
Takakazu Onishi ◽  
Hisashi Nakamura ◽  
Takuya Tezuka ◽  
Susumu Hasegawa ◽  
Kaoru Maruta ◽  
...  
Keyword(s):  
High Temperature ◽  
Flame Structure ◽  
Jet Flames

Nitrogen-Diluted Methane Flames in the Near-and Far-Field

2013 ◽  
Vol 135 (4) ◽  
Author(s):  
James Kribs ◽  
Nancy Moore ◽  
Tamir Hasan ◽  
Kevin Lyons
Keyword(s):  
Reynolds Number ◽  
Natural Gas ◽  
Low Reynolds Number ◽  
Industrial Applications ◽  
Flame Height ◽  
Far Field ◽  
Jet Flames ◽  
Jet Flame ◽  
Lifted Flame ◽  
Nitrogen Dilution

With the increased utilization of multicomponent fuels, such as natural gas and biogas, in industrial applications, there is a need to be able to effectively model and predict the properties of jet flames for mixed fuels. In addition, the interaction of these diluted fuels with outside influences (such as differing levels of coflow air) is a primary consideration. Experiments were performed on methane jet flames under the influence of varying levels of nitrogen dilution, from low Reynolds number lifted regimes to blowout, observing the influence of the nitrogen on lifted flame height and flame chemiluminesence images. These findings were analyzed and compared with existing lifted jet flame relations, such as the flammable region approximation proposed by Tieszen et al., as well as to undiluted flames. The influence of nitrogen dilution was seen to have an effect on the liftoff height of the flame, as well as the blowout velocity of the flame, but was seen to have a less pronounced effect compared with flames with coflowing air.

Liftoff behaviors and flame structure of dimethyl ether jet flame in CH4/air vitiated coflow

2019 ◽  
Vol 233 (8) ◽  
pp. 1039-1046 ◽  
Author(s):  
Wei Fu ◽  
Fengyu Li ◽  
Haitao Zhang ◽  
Bolun Yi ◽  
Yanju Liu ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
High Speed ◽  
Equivalence Ratio ◽  
Flame Structure ◽  
High Speed Photography ◽  
Flame Stability ◽  
Jet Flames ◽  
Jet Flame ◽  
Field Temperature ◽  
Vitiated Coflow

The objective of this paper is to investigate the flame structure and liftoff behaviors of a dimethyl ether central jet in CH4/air vitiated coflow in a coflow burner. The liftoff behaviors of dimethyl ether jet flames in the air flow were studied firstly. The flame stability of the burner was analyzed by measuring the flow field temperature with thermocouples. By changing the coflow rate and CH4 equivalence ratio, the liftoff behaviors of dimethyl ether jet flames under different vitiated coflow environments were discussed. The jet flame structure was also analyzed qualitatively by high-speed photography.

scholarly journals Edge flame structure in a turbulent lifted flame: A direct numerical simulation study

2016 ◽  
Vol 169 ◽  
pp. 110-128 ◽  
Author(s):  
Shahram Karami ◽  
Evatt R. Hawkes ◽  
Mohsen Talei ◽  
Jacqueline H. Chen
Keyword(s):  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Simulation Study ◽  
Flame Structure ◽  
Lifted Flame

On the flame structure and stabilization characteristics of autoignited laminar lifted n-heptane jet flames in heated coflow air

2021 ◽  
Vol 223 ◽  
pp. 307-319
Author(s):  
Ki Sung Jung ◽  
Seung Ook Kim ◽  
Suk Ho Chung ◽  
Chun Sang Yoo
Keyword(s):  
Flame Structure ◽  
Jet Flames

Turbulent Lifted Flames in the Hysteresis Regime and the Effects of Coflow

2006 ◽  
Vol 128 (4) ◽  
pp. 319-324 ◽  
Author(s):  
S. D. Terry ◽  
K. M. Lyons
Keyword(s):  
Flow Regime ◽  
Laminar Flames ◽  
Stability Criteria ◽  
Jet Flames ◽  
Lifted Flame ◽  
Fuel Flow ◽  
Lifted Flames

A study of the characteristics of turbulent lifted-jet flames in the hysteresis regime was performed using methane and ethylene fuels in laminar and turbulent air coflows. Reattachment velocities and lifted flame heights just prior to reattachment vary linearly as for laminar flames in coflow. The flow regime of the coflow (i.e., laminar or turbulent) did not appear to affect the behavior of these flames. These observations are of utility in designing maximum turndown burners in air coflow, especially for determining stability criteria in low fuel-flow applications.

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