217 Experimental Study for Quenching Distance by Configuration Changes of Slit and Combustion Bomb in Flame Propagation of DME Fuel

2006 ◽  
Vol 2006.41 (0) ◽  
pp. 85-86
Author(s):  
Yukitoshi AOYAMA ◽  
Satoshi OKAJIMA
Keyword(s):  
Experimental Study ◽  
Flame Propagation ◽  
Quenching Distance ◽  
Configuration Changes

EXPERIMENTAL STUDY ON FLAME PROPAGATION IN A STRAIGHT PIPE

2016 ◽  
Vol 78 (8-3) ◽  
Author(s):  
Siti Zubaidah Sulaiman ◽  
Rafiziana Md Kasmani ◽  
A. Mustafa
Keyword(s):  
Experimental Study ◽  
Flame Propagation ◽  
Experimental Work ◽  
Diameter Ratio ◽  
Straight Pipe ◽  
Pipe Length ◽  
Operating Condition ◽  
Consistent Trend ◽  
Length To Diameter Ratio

Flame propagation in a closed pipe with diameter 0.1 m and 5.1 m long, as well as length to diameter ratio (L/D) of 51, was studied experimentally. Hydrogen/air, acetylene/air and methane/air with stoichiometric concentration were used to observe the trend of flame propagation throughout the pipe. Experimental work was carried out at operating condition: pressure 1 atm and temperature 273 K. Results showed that all fuels are having a consistent trend of flame propagation in one-half of the total pipe length in which the acceleration is due to the piston-like effect. Beyond the point, fuel reactivity and tulip phenomenon were considered to lead the flame being quenched and decrease the overpressures drastically. The maximum overpressure for all fuels are approximately 1.5, 7, 8.5 barg for methane, hydrogen, and acetylene indicating that acetylene explosion is more severe. 

Experimental study of flame propagation across a perforated plate

2018 ◽  
Vol 43 (17) ◽  
pp. 8524-8533 ◽  
Author(s):  
Quan Li ◽  
Xuxu Sun ◽  
Shouxiang Lu ◽  
Zhi Zhang ◽  
Xing Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flame Propagation ◽  
Perforated Plate

Theoretical Analysis of Flame Propagation in Meso and Microscale Channels

2003 ◽  
Author(s):  
Yiguang Ju
Keyword(s):  
Flow Velocity ◽  
Heat Loss ◽  
Flame Propagation ◽  
Critical Value ◽  
Flow Speed ◽  
External Heat ◽  
Channel Width ◽  
Recent Experimental Data ◽  
Quenching Distance ◽  
Large Flow

Extinction and flame propagation in a meso and microscale channels are investigated analytically. Emphasis was paid to the coupling of wall heat loss, wall preheating, external heat loss and chemical reaction. The results showed that, wall thermal properties, channel width and flow velocity have dramatic effects on the flame propagation and lead to multiple flame regimes and extinction limits. With the decrease of channel width, flame reaches its first quenching limit, the so called critical quenching distance. However, with a further decrease of channel width, the results show that there exists a slow burning flame. With the increase of wall heat loss the speed of the slow burning flame slightly decreases and eventually reaches its second burning limit. With the change of the flow velocity, the results show that sub-limit flame can only exist at flow velocity larger than a critical value. At moderate flow velocity, flame speed increases with the increase of flow speed. At very large flow velocity, flame will be blown off. The above results are confirmed from the recent experimental data.

Experimental study of the flame propagation characteristics of pulverized coal in an O2/CO2 atmosphere

Fuel ◽  
2020 ◽  
Vol 262 ◽  
pp. 116678 ◽  
Author(s):  
Yijun Zhao ◽  
Wenda Zhang ◽  
Dongdong Feng ◽  
Pengxiang Wang ◽  
Shaozeng Sun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flame Propagation ◽  
Pulverized Coal ◽  
Propagation Characteristics ◽  
Co2 Atmosphere
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