Experimental and Modeling Study on the Flame Structure and Reaction Zone Size of Dimethyl Ether/Air Premixed Flame in an Industrial Boiler Furnace

2013 ◽  
Vol 27 (11) ◽  
pp. 7054-7066 ◽  
Author(s):  
Yinhu Kang ◽  
Xiaofeng Lu ◽  
Quanhai Wang ◽  
Xuanyu Ji ◽  
Shanshan Miao ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Reaction Zone ◽  
Flame Structure ◽  
Premixed Flame ◽  
Zone Size ◽  
Boiler Furnace ◽  
Industrial Boiler ◽  
Modeling Study

A comparison of turbulent dimethyl ether and methane non-premixed flame structure

2013 ◽  
Vol 34 (1) ◽  
pp. 1447-1454 ◽  
Author(s):  
Kathryn N. Gabet ◽  
Han Shen ◽  
Randy A. Patton ◽  
Frederik Fuest ◽  
Jeffrey A. Sutton
Keyword(s):  
Dimethyl Ether ◽  
Flame Structure ◽  
Premixed Flame

The Structure of Two-Stage Counterflow n-Heptane-Air Flames

2000 ◽  
Author(s):  
S. K. Aggarwal ◽  
H. S. Xue
Keyword(s):  
Strain Rate ◽  
Reaction Zone ◽  
Equivalence Ratio ◽  
Flame Structure ◽  
Premixed Combustion ◽  
Premixed Flame ◽  
Partially Premixed Combustion ◽  
Reaction Zones ◽  
Partially Premixed ◽  
Partially Premixed Flame

Partially premixed flames are formed by mixing air (in less than stoichiometric amounts) into the fuel stream prior to the reaction zone, where additional air is available for complete combustion. Such flames can occur in both laboratory and practical combustion systems. In advanced gas turbine combustor designs, such as a lean direct injection (LDI) combustor, partially premixed combustion represents an impotent mode of burning. Spray combustion often involves partially premixed combustion due to the locally fuel vapor-rich regions. In the present study, the detailed structure of n-heptane/air partially premixed flame in a counterflow configuration is investigated. The flame is computed by employing the Oppdif code and a detailed reaction mechanism consisting of 275 elementary reactions and 41 species. The partially premixed flame structure is characterized by two-stage burning or two distinct but synergistically coupled reaction zones, a rich premixed zone on the fuel side and a ‘nonpremixed zone on the air side. The fuel is completely consumed in the premixed zone with ethylene and acetylene being the major intermediate species. The reactions involving the consumption of these species are found to be the key rate-limiting reactions that characterize interactions between the two reaction zones, and determine the overall fuel consumption rate. The flame response to the variations in equivalence ratio and strain rate is examined. Increasing equivalence ratio and/or strain rate to a critical value leads to merging of the two reaction zones. The equivalence ratio variation affects the rich premixed reaction zone, while the variation in strain rate predominantly affects the nonpremixed reaction zone. The flame structure is also characterized in terms of a modified mixture fraction (conserved scalar), and laminar flamelet profiles are provided.

An experimental and modeling study of NOx and CO emission behaviors of dimethyl ether (DME) in a boiler furnace

2014 ◽  
Vol 122 ◽  
pp. 129-140 ◽  
Author(s):  
Yinhu Kang ◽  
Xiaofeng Lu ◽  
Quanhai Wang ◽  
Xuanyu Ji ◽  
Shanshan Miao ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Boiler Furnace ◽  
Co Emission ◽  
Modeling Study

A Study on Flame Structures in CH4 Counterflow Partially Premixed Flame

2014 ◽  
Vol 694 ◽  
pp. 474-477
Author(s):  
Jing Luo ◽  
Lian Sheng Liu ◽  
Zi Zhong Chen
Keyword(s):  
Reaction Zone ◽  
Equivalence Ratio ◽  
Flame Structure ◽  
Premixed Flame ◽  
Counterflow Flame ◽  
Partially Premixed ◽  
Flame Structures ◽  
The Rich ◽  
Partially Premixed Flame ◽  
Two Temperature

An experimental and simulation work had been conducted to study a one-dimensional partially premixed methane/air counterflow flame in this paper. Flame images are obtained through experiments and computations using GRIMech 3.00 chemistry were performed for the flames studied. The partially premixing effects upon the flame were revealed by comparing the flame structures and emissions with premixed flames at the same equivalence ratio. The results show the premixed flame only has a single flame structure. However, PPF has distinct double flame structures at present equivalence ratio. Temperature is relatively high in the whole combustion zone for premixed flame, while, for PPF, there are two temperature peaks in a rich premixed reaction zone on the fuel side and a nonpremixed reaction zone on the oxidizer side respectively. For PPF, NO concentration in the nonpremixed zone is much higher compared to that in the rich premixed zone because of higher OH concentration in the nonpremixed zone.

scholarly journals Flammability and Propagation Dynamics of Planar Freely Propagating Dimethyl Ether Premixed Flame

ACS Omega ◽  
2020 ◽  
Vol 5 (19) ◽  
pp. 10965-10976 ◽  
Author(s):  
Congcong Liu ◽  
Yi Zhang ◽  
Deyang Xiong ◽  
Xiaomei Huang ◽  
Pengyuan Zhang ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Premixed Flame ◽  
Propagation Dynamics

POD Scale Analysis of Turbulent Premixed Flame Structure at Elevated Pressures

2019 ◽  
pp. 1-23
Author(s):  
Yaohui Nie ◽  
Jinhua Wang ◽  
Shilong Guo ◽  
Weijie Zhang ◽  
Wu Jin ◽  
...  
Keyword(s):  
Flame Structure ◽  
Premixed Flame ◽  
Scale Analysis ◽  
Turbulent Premixed Flame ◽  
Elevated Pressures ◽  
Turbulent Premixed

scholarly journals Photoionization mass spectrometry and modeling study of a low-pressure premixed flame of ethyl pentanoate (ethyl valerate)

2017 ◽  
Vol 36 (1) ◽  
pp. 1185-1192 ◽  
Author(s):  
D.A. Knyazkov ◽  
I.E. Gerasimov ◽  
N. Hansen ◽  
A.G. Shmakov ◽  
O.P. Korobeinichev
Keyword(s):  
Mass Spectrometry ◽  
Low Pressure ◽  
Premixed Flame ◽  
Photoionization Mass Spectrometry ◽  
Modeling Study
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