Effect of thermal conductivity of solid wall on combustion efficiency of a micro-combustor with cavities

Effect of solid material on the blow-off limit of CH 4 /air flames in a micro combustor with a plate flame holder and preheating channels

“…Wan et al [12] and Fan et al [13] developed a micro bluff-body combustor with excellent flame stabilization performance. Recently, Wan et al [14][15][16] and Yang et al [17] investigated the combustion characteristics of H 2 /air mixtures in micro combustors with cavities, and they confirmed the occurrence of flame tip opening which leads to a decrease in the combustion efficiency. However, for CH 4 /air flames, this phenomenon does not occur and the flame stability was greatly improved [18,19].…”

Kinetic effects of hydrogen addition on the catalytic self-ignition of methane over platinum in micro-channels

“…Since heat transfer along the wall significantly affects the flame stability [14,39,40], heat transfer along the wall is considered in this model. The appropriate energy equation for the solid phase is given as follow:…”

Thermal management and catalytic combustion stability characteristics of premixed methane/air in heat recirculation meso-combustors

“…15 Effects of methane/oxygen mole ratio on methane conversion and outlet temperature are presented in Figure 3. The single channel of the ceramic monolith (length = 10 mm, height = 1 mm and width = 1 mm) is coated with the noble metal rhodium catalyst in the experiment and simulation.…”

“…At present, various flame stabilization techniques in small-scale combustors have been developed, such as flame stabilization based on the reflow effect, catalytic combustion, excess enthalpy combustion, and other techniques. 10,11 Micro-combustors with bluff body, 12,13 cavities, [14][15][16] and backward facing step 17 offer new designs of small combustors by the formation of reflow fields, which enhances the fuel/air mixing and prolongs the residence time. Similarly, benefitting from the recirculation zone arising from the swirling flow, meso-combustor with the vortox flow enlarges operating ranges of flame combustion.…”