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

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

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

Analysis of turbulent premixed flame structure using simultaneous PIV-OH PLIF

2004 ◽  
Vol 7 (1) ◽  
pp. 43-54 ◽  
Author(s):  
Y. Cho ◽  
J. -H. Kim ◽  
T Cho ◽  
I Moon ◽  
Y Yoon ◽  
...  
Keyword(s):  
Flame Structure ◽  
Premixed Flame ◽  
Turbulent Premixed Flame ◽  
Turbulent Premixed

Asymptotic treatment of premixed flame structure with diffusion.

AIAA Journal ◽  
1967 ◽  
Vol 5 (4) ◽  
pp. 808-809 ◽  
Author(s):  
FRANCIS E. FENDELL
Keyword(s):  
Flame Structure ◽  
Premixed Flame

H2/CO/air premixed and partially premixed flame structure at different pressures based on reaction limit analysis

2018 ◽  
Vol 63 (19) ◽  
pp. 1260-1266 ◽  
Author(s):  
Zaigang Liu ◽  
Wenjun Kong ◽  
Jean-Louis Consalvi ◽  
Wenhu Han
Keyword(s):  
Limit Analysis ◽  
Flame Structure ◽  
Premixed Flame ◽  
Partially Premixed ◽  
Partially Premixed Flame

Fuel wall film effects on premixed flame propagation, quenching and emission

2018 ◽  
Vol 21 (6) ◽  
pp. 1055-1066 ◽  
Author(s):  
Mingyuan Tao ◽  
Haiwen Ge ◽  
Brad VanDerWege ◽  
Peng Zhao
Keyword(s):  
Flame Propagation ◽  
Direct Injection ◽  
Flame Structure ◽  
Three Dimensional ◽  
Premixed Flame ◽  
Practical Significance ◽  
Detailed Chemistry ◽  
Rich Mixture ◽  
Wall Film ◽  
Flame Quenching

The formation of fuel wall film is a primary cause for efficiency loss and emissions of unburnt hydrocarbons and particulate matters in direct injection engines, especially during cold start. When a premixed flame propagates toward a wall film of liquid fuel, flame structure and propagation could be fundamentally affected by the vaporization flux and the induced thermal and concentration stratifications. It is, therefore, of both fundamental and practical significance to investigate the consequent effect of a wall film on flame quenching. In this work, the interaction of a laminar premixed flame and a fuel wall film has been studied based on one-dimensional direct numerical simulation with detailed chemistry and transport. The mass and energy balance at the wall film interface have been implemented as boundary condition to resolve vaporization. Parametric studies are further conducted with various initial temperatures of 600–800 K, pressures of 7–15 atm, fuel film and wall temperatures of 300–400 K. By comparing the cases with an isothermal dry wall, it is found that the existence of a wall film always promotes flame quenching and causes more emissions. Although quenching distance can vary significantly among conditions, the local equivalence ratio at quenching is largely constant, suggesting the dominant effects of rich mixture and rich flammability limit. By further comparing constant volume and constant pressure conditions, it is observed that pressure and boiling point variation dominate the vaporization boundary layer development and flame quenching, which further suggests that increased pressure during compression stroke in engines can significantly suppress film vaporization. Emissions of unburnt hydrocarbon, soot precursor and low-temperature products before and after flame quenching are also investigated in detail. The results lead to useful insights on the interaction of flame propagation and wall film in well-controlled simplified configurations and shed light on the development of wall film models in three-dimensional in-cylinder combustion simulation.

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