Effects of diluents on the lifted flame characteristics in laminar nonpremixed coflow propane jets

2020 ◽  
Vol 222 ◽  
pp. 145-151
Author(s):  
Suhyeon Oh ◽  
Kyu Ho Van ◽  
Chun Sang Yoo ◽  
Suk Ho Chung ◽  
Jeong Park
Keyword(s):  
Lifted Flame

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

scholarly journals Soot control of laminar jet-diffusion lifted flame excited by high-frequency acoustic oscillation

2017 ◽  
Vol 12 (2) ◽  
pp. JTST0024-JTST0024 ◽  
Author(s):  
Mitsutomo HIROTA ◽  
Yuji NAKAMURA ◽  
Tsutomu SAITO
Keyword(s):  
High Frequency ◽  
Acoustic Oscillation ◽  
Laminar Jet ◽  
Lifted Flame

Noise Generated by a Lifted Flame in a Vitiated Co-Flow

2008 ◽  
Author(s):  
Robert Z. Szasz ◽  
Christophe Duwig ◽  
Laszlo Fuchs
Keyword(s):  
Acoustic Field ◽  
Hybrid Approach ◽  
Low Frequency ◽  
Lifted Flame ◽  
Inhomogeneous Wave Equation ◽  
Large Eddy ◽  
Ignition Region ◽  
Acoustic Sources ◽  
Pod Analysis ◽  
Low Frequency Waves

The acoustic field generated by a lifted flame is studied by a hybrid approach. First, Large Eddy Simulations (LES) are used to compute the flow and the acoustic sources. Next, an inhomogeneous wave equation is solved to obtain the resulting acoustic field. The flow computations show good agreement with experimental data. The dominant acoustic sources are found to be located in the ignition region and at the tip of the flame. The acoustic computations revealed the presence of low-frequency waves radiated in the far-field. The shape of the most energetic acoustic modes are identified by POD analysis to be axial modes.

scholarly journals Leaner Lifted-Flame Combustion Enabled by the Use of an Oxygenated Fuel in an Optical CI Engine

2016 ◽  
Vol 9 (3) ◽  
pp. 1526-1543 ◽  
Author(s):  
Ryan K. Gehmlich ◽  
Cosmin E. Dumitrescu ◽  
Yefu Wang ◽  
Charles J. Mueller
Keyword(s):  
Flame Combustion ◽  
Lifted Flame ◽  
Oxygenated Fuel ◽  
Ci Engine

scholarly journals Active Control for Lifted Flame using a Speaker-Driven Synthetic Jet

2006 ◽  
Vol 72 (715) ◽  
pp. 901-908 ◽  
Author(s):  
Kakuji OGAWARA ◽  
Tatsuo NISHIMURA ◽  
Daisuke KUWAHARA ◽  
Masayuki KITAZAWA ◽  
Yoshikazu ISHIDA
Keyword(s):  
Active Control ◽  
Synthetic Jet ◽  
Lifted Flame

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.

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