Volume : III, Issue : IX, September - 2013

A numerical study of methane–air premixed flame in a diverging micro–channel

Mohit Gupta, Rajesh Gupta

Abstract :

In the present paper, numerical study on the characterization of flame stabilization behaviour in a 2.0 mm wide diverging channel are carried out with premixed methane–air mixtures by solving the appropriate form of two–dimensional governing equations. The effects of combustor divergent angle, equivalence ratio and boundary conditions (wall and inlet) on the flame temperature are reported in this work. The simulation results show that the temperature of the flame was highest for a fuel–air mixture having stoichiometric ratio. The diverging portion of channel is preheated from the bottom side with a sintered metal burner to provide a positive temperature gradient along the direction of fluid flow which helps in stabilizing a flame in the channel. Further, it was noted that flame is stable for velocity limits between 0.2 m/s and 1.9 m/s for a range of mixture equivalence ratios. There was no significant change in flame temperature irrespective of divergent angle. The boundary conditions such as wall temperature affected the stabilization of flame.

Keywords :

Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Mohit Gupta, Rajesh Gupta A numerical study of methane-air premixed flame in a diverging micro-channel Indian Journal of Applied Research, Vol.III, Issue.IX September 2013

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