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Small-scale power generation using heat energy from hydrocarbon (HC) fuels is  a proven technology. In this study, we analyzed 2D flame development in  meso-scale Swiss roll combustor (SW). A mixture of 60% butane and 40 %  propane was used (0.25-0.55 l/min). During all the analyses, equivalence  ratio (1.1) was kept constant by adjusting air quantity against fuel  quantity. The effect of increase in the mixture velocity on the development  of flame shapes/patterns was monitored. We found different patterns of  flame, e.g., Planar, Concave, conical, with the increase in mixture  velocity. Increase in combustion chamber temperature was also noted. No  Flashback was observed and blowout was observed with very high mixture  velocity. Combustion chamber temperatures were found to be increasing with  the increase in mixture velocity at the same equivalence ratio. Elongation  of the flame was observed because of the increased flow velocity. Heat  recirculation to the reactants enhances flame characteristics.

Effect of mixture velocity for given equivalence ratio on flame development in Swiss roll combustor