NDLI: Theoretical Analysis of Flame Propagation in Meso and Microscale Channels

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ju, Yiguang
Copyright Year	2003
Abstract	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.
Sponsorship	Heat Transfer Division
Starting Page	177
Ending Page	183
Page Count	7
File Format	PDF
ISBN	0791836940
DOI	10.1115/HT2003-47516
e-ISBN	0791836797
Volume Number	Heat Transfer: Volume 2
Conference Proceedings	ASME 2003 Heat Transfer Summer Conference
Language	English
Publisher Date	2003-07-21
Publisher Place	Las Vegas, Nevada, USA
Access Restriction	Subscribed
Subject Keyword	Thermal properties Flames Microscale devices Heat losses Chemical reactions Theoretical analysis Combustion Quenching (metalworking) Flow (dynamics)
Content Type	Text
Resource Type	Article

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